English Subordination, Conditional Sentences and Word Confusions

In English, building complex sentences relies on three essential pillars: subordinate clauses, conditional structures, and mastery of commonly confused words. These elements are key to expressing yourself with clarity, precision, and logic.

This course is designed to give you a complete and step-by-step understanding of these fundamental grammar points, through clear explanations, real-life examples, and interactive exercises.

🧱 What you’ll learn

• The 8 main types of subordinate clauses:
• Completive clauses
• Causative clauses
• Concessive conjunctions
• Purpose clauses
• Conditional / suppositional clauses
• Concessive clauses
• Relative clauses
• Circumstantial clauses
• The 4 types of conditional sentences:
• Type 0: scientific facts / general truths
• Type 1: real conditions in the future
• Type 2: unreal present situations
• Type 3: regrets / past conditions
• The most common word confusions such as:
• never / ever, if / whether, used to / be used to
• still / always, no more / any more / any longer, etc.

🎯 Learning objectives

• Identify and use each type of subordinate clause correctly
• Master conditional sentences based on context
• Avoid common vocabulary confusions
• Improve your ability to understand and produce complex English sentences

📚 Course structure

• Section 2: Types of subordinate clauses
• Section 3: Conditional sentences (if-clauses)
• Section 4: Commonly confused words
• Section 5: Final exercises & review

Completive Clauses

Completive clauses complete the meaning of a verb like think, believe, know. They are often introduced by that.

English Sentence	Meaning
I think that he is tired.	I believe he feels low on energy or needs rest.
She said that she would come.	She stated she planned to be present or arrive later.
We know that the exam is tomorrow.	We are aware that the test takes place the next day.

📝 Exercise – Complete the clause

• I believe ____________.
• He told me ____________.
• They think ____________.

Suggested answers:

• I believe that she is honest.
• He told me that he was late.
• They think that we will win.

Causative Clauses

Causative clauses express the reason for an action. They are introduced by because, since, as.

English Sentence	Meaning
We stayed home because it was raining.	We remained at the house due to the fact that water was falling from the sky.
I left early since I was tired.	I went away before the usual time because I felt low on energy.
As she was late, we started without her.	Because she did not arrive on time, we began with her not present.

📝 Exercise – Choose the right conjunction

• I stayed in _______ I was sick.
• They cancelled the trip _______ it was snowing.

Answers:

• because
• as / because

Concessive Clauses

These clauses express contrast. They are introduced by conjunctions such as although, even though, whereas.

English Sentence	Meaning
Although it was raining, we went out.	In spite of the fact that water was falling from the sky, we went outside.
Even though she was tired, she kept working.	Despite the fact that she had little energy, she continued doing her job.
Whereas I like tea, he prefers coffee.	While I enjoy drinking hot tea, he chooses coffee instead.

📝 Exercise – Translate into English

• Bien qu’il fasse froid, elle est sortie.
• Même s’il pleuvait, nous avons joué.

Answers:

• Although it was cold, she went out.
• Even though it was raining, we played.

Purpose Clauses

Purpose clauses express the goal or intention of an action. They are introduced by so that, in order that, in order to.

English Sentence	Meaning
I study so that I can pass.	I learn and review with the goal of succeeding in a test or exam.
He trains hard in order to win.	He exercises with effort with the purpose of achieving victory.
She left early so that she wouldn’t be late.	She went away before the usual time to avoid arriving after the expected time.

📝 Exercise – Complete with “so that” or “in order to”

• I worked hard ______ finish early.
• He called her ______ apologize.

Answers:

• in order to
• to or in order to

Conditional / Supposition Clauses

These clauses express a condition or a hypothetical situation. They are often introduced by if, unless, provided that.

English Sentence	Meaning
I will help you if I have time.	I will assist you on the condition that I am not busy.
You can’t go unless you finish.	You are not allowed to leave except if you complete the task.
Provided that he agrees, we’ll start now.	Only if he says yes or gives permission, we will begin immediately.

📝 Exercise – Complete with a conditional conjunction

• I’ll call you __________ I arrive.
• You won’t pass __________ you study.

Suggested answers:

• if
• unless

Concessive Clauses

These clauses express contrast or unexpected results. They are introduced by although, even though, though.

English Sentence	Meaning
Although he was tired, he worked.	Even if he had little energy or felt exhausted, he did his job.
Even though it was raining, we played.	Despite the fact that water was falling from the sky, we enjoyed the activity.
Though he tried, he failed.	Even if he made an effort, he did not succeed.

📝 Exercise – Translate into English

• Bien qu’elle soit malade, elle est venue.
• Même s’il fait froid, ils sortent.

Possible answers:

• Although she is sick, she came.
• Even though it’s cold, they go out.

Relative Clauses

These clauses give extra information about a noun. They are introduced by who, which, that.

English Sentence	Meaning
The boy who is talking is my friend.	The male child that is speaking right now is someone I know well.
The car that I bought is red.	The vehicle which I paid money for and now own has the color red.
The book which she lent me is great.	The item to read that she gave me temporarily is very good.

📝 Exercise – Complete with a relative pronoun

• The man __________ helped me was kind.
• This is the laptop __________ I use for work.

Answers:

• who
• that

Circumstantial Clauses

These clauses give information about time, place or manner. They are introduced by when, where, while, as soon as, before, etc.

English Sentence	Meaning
I’ll call you when I arrive.	I will phone you at the moment I get to the place.
We met while we were studying.	We saw each other during the time we were learning or reviewing school material.
Before you go, close the door.	At an earlier time than your departure, make sure the door is not open.

📝 Exercise – Choose the right conjunction

• I’ll wait __________ you finish.
• He called me __________ I was sleeping.

Answers:

• until
• while

If-clauses are used to express a condition and its possible result. They are very common in both spoken and written English.

There are four main types of conditional sentences:

• Type 0: scientific facts or general truths
• Type 1: real future condition
• Type 2: unreal or hypothetical situation in the present
• Type 3: regret or hypothetical situation in the past

🔄 Summary Table

Type	If-Clause	Main Clause	Example
0	simple present	simple present	If you heat water, it boils.
1	simple present	will + base verb	If it rains, I will stay home.
2	simple past	would + base verb	If I had money, I would travel.
3	past perfect	would have + past participle	If she had studied, she would have passed.

🧪 Type 0 – Scientific or General Truth

This type expresses universal truths or scientific facts.

English	Meaning
If you heat ice, it melts.	If you apply warmth to frozen water, it changes to liquid.
If you don't eat, you get hungry.	If you do not consume food, your body feels the need for nourishment.
If you mix red and blue, you get purple.	If you combine the color of blood and the color of the sky, you produce a new color that is a mix of both.

⏳ Type 1 – Real Future Condition

This type describes a realistic situation that might happen in the future.

English	Meaning
If it rains tomorrow, we will cancel the trip.	If water falls from the sky the next day, we will stop the planned journey.
If you study, you will pass the exam.	If you review and learn the material, you will succeed in the test.
If I see him, I will tell him.	If I notice or meet that person, I will give him the information.

💭 Type 2 – Unreal Present Condition

This type is used for imaginary or unreal situations in the present or future.

English	Meaning
If I were rich, I would buy a castle.	If I had a lot of money, I would purchase a large historic house.
If she had more time, she would travel.	If she had extra hours available, she would go on trips to different places.
If we lived in Paris, we would visit the Louvre.	If our home were in the capital of France, we would go see the famous art museum.

⏱️ Type 3 – Past Regret

This type expresses a regret or unreal condition in the past.

English	Meaning
If I had studied, I would have passed.	If I had reviewed or learned before, I would have succeeded.
If they had left earlier, they would have caught the train.	If they had gone away before the usual time, they would have been able to take the scheduled public transport.
If you had told me, I would have helped.	If you had informed me, I would have offered assistance.

📝 Exercise – Identify the Conditional Type

• If I win the lottery, I will travel the world. → __________
• If I were you, I wouldn’t do that. → __________
• If you touch fire, it burns. → __________
• If he had studied, he would have passed. → __________

Show answers

• Type 1
• Type 2
• Type 0
• Type 3

Some English words look or sound similar, but are used in different contexts. This section will help you avoid frequent mistakes by comparing commonly confused expressions.

Never vs Ever

Never is used in affirmative sentences to mean "not at any time". Ever is used in questions or negatives to mean "at any time".

English	Meaning
I have never been to Japan.	I have at no time in the past visited the country called Japan.
Have you ever tried sushi?	Have you at any time before now tasted the Japanese dish made of rice and raw fish?
No one has ever said that to me.	No person has at any time in the past told me those words.

📝 Exercise

• Have you _______ seen a kangaroo?
• I’ve _______ eaten insects.

Answers:

• ever
• never

If vs Whether

If expresses a condition. Whether introduces alternatives or choices (often with "or not").

English	Meaning
I’ll come if I have time.	I will arrive on the condition that I am not busy.
I don’t know whether he’s at home or not.	I am uncertain if he is in his house or not.
She asked whether she could leave.	She inquired if it was possible for her to go away.

📝 Exercise

• I wonder ________ he’ll say yes.
• I’ll call you ________ I finish early.

Answers:

• whether
• if

Used to vs Be used to

Used to = something that was true in the past but no longer is. Be used to = being familiar or accustomed to something.

English	Meaning
I used to smoke.	I did something regularly in the past but not anymore — I smoked cigarettes.
She is used to waking up early.	She is familiar with or comfortable doing waking up early.
They’re not used to this weather.	They are not familiar with or comfortable experiencing this kind of weather.

📝 Exercise

• I ________ play the piano when I was a child.
• He is ________ working long hours.

Answers:

• used to
• used to (after "is")

No more / Any more / Any longer

No more is used in affirmative sentences. Any more and any longer are used in negative sentences.

English	Meaning
I want no more excuses.	I do not want any further or additional excuses.
We don’t live here any more.	We have stopped or no longer live here.
He doesn’t smoke any longer.	He has stopped and no longer smokes.

📝 Exercise

• We don’t need help ________.
• I have ________ money to spend.

Answers:

• any more
• no more

Still vs Always

Still means that something continues. Always refers to a habit or something that happens every time.

English	Meaning
She still lives in London.	She lives in London up to now, without change.
They always go jogging on Sundays.	They go jogging on Sundays as a regular habit, every time.
I’m still waiting for his call.	I am waiting for his call and this has not stopped yet.

📝 Exercise

• Do you ________ play tennis every week?
• She is ________ sleeping at noon.

Answers:

• always
• still

So vs Such

So is used before an adjective. Such is used before a noun or adjective + noun.

English	Meaning
She is so beautiful.	She is to a very high degree or very much beautiful.
It was such a good movie.	It was an example of something to a great extent or degree a good movie.
They are so happy together.	They are to a very high degree or very much happy together.

📝 Exercise

• It’s ________ a nice day.
• You’re ________ kind!

Answers:

• such
• so

Too vs Enough

Too = more than necessary (placed before adjective). Enough = sufficient (placed after adjective).

English	Meaning
It’s too cold to swim.	The temperature is more than needed or wanted cold for swimming.
She isn’t tall enough to reach the shelf.	She is not at the required level or degree tall to reach the shelf.
This bag is too heavy.	This bag weighs more than is comfortable or allowed.

📝 Exercise

• He is not strong ________ to lift it.
• This coffee is ________ hot to drink.

Answers:

• enough
• too

Much / Many / A lot of

Many = countable nouns. Much = uncountable nouns. A lot of = both.

English	Meaning
How many books do you have?	Asking for the number of books you possess.
He doesn’t have much money.	He has a small amount of money.
There are a lot of people here.	There are a large number of people present.

📝 Exercise

• There isn’t ________ water left.
• How ________ emails did you get?

Answers:

• much
• many

Say vs Tell

Say = used without a person (or with "to"). Tell = used with a person directly after.

English	Meaning
He said it was late.	He expressed with words that it was late.
She told me the truth.	She gave me information or shared the truth.
What did you say?	What words did you express or speak?

📝 Exercise

• He ________ me to stay calm.
• She didn’t ________ anything.

Answers:

• told
• say

Like vs As

Like = comparison. As = function or role.

English	Meaning
He sings like a professional.	He sings in a similar way to a professional.
She works as a teacher.	She works in the role or position of a teacher.
Use this box as a table.	Use this box for the purpose or function of a table.

📝 Exercise

• He acts _______ a child.
• She works _______ a nurse.

Answers:

• like
• as

🎉 Congratulations on reaching the end of this complete course! Below is a table that summarizes the most important concepts you've learned:

📝 Exercise 1 – Complete the subordinate clause

• I know ___________________________________________
• The book ___________________________________________ is great.
• We left ___________________________________________

Show answers

• I know that he’s honest.
• The book that you gave me is great.
• We left because it was late.

🧠 Exercise 2 – Complete the conditional sentence

• If I see her, ___________________________________________
• If I were you, ___________________________________________
• If they had studied, ___________________________________________

Show answers

• If I see her, I will talk to her.
• If I were you, I wouldn’t do that.
• If they had studied, they would have passed.

💡 Exercise 3 – Choose the correct word

• Have you _______ visited London? (ever / never)
• I’m not used _______ spicy food. (to / for)
• He said / told me he was tired.
• We don’t need help _______. (no more / any more)

Show answers

• ever
• to
• told
• any more

🎯 Exercise 4 – Mixed grammar review

• If I had more time, ___________________________________________
• She is not tall ________ to reach the shelf. (too / enough)
• I wonder ________ he will come. (if / whether)

Show answers

• If I had more time, I would travel.
• enough
• whether