Conditional Sentence is often called the sentence modality. Modal sentence means used to imagine an activity or course of action if the conditions are met. However, the underlying assumption may occur or may not occur depending on the condition that the filing.
In English, there are three types of presupposition, namely:
- Probable Condition
- Improbable Condition
- Impossible Condition
1. Probable Condition
Condition Probable often also referred to as "Present Real Conditional" or "Type I" because of an event might happen if the conditions are met. This type is explained that an activity or activities in the future will be done if requirements are met.
Type I is subdivided into:
a. Modality in the future
Sentence Patterns:If + Present Simple Tense Sentences, Sentence Simple Future Tense, OrSimple Future Tense Sentences + if + Simple Present Tense Sentences
Examples:
If I have a lot of money, I'll buy a car.
(If I had a lot of money, I would buy a car)
If he runs quickly intervening, he will get there soon.
(If she ran quickly, then he will get there soon)
I will visit them if I have enough time.
(I will visit them if I have time)
b. Truth General / Daily Habit
This type is usually referred to as "Zero Conditional". This type is used to provide an explanation of an activity that would have occurred if the conditions are met.
Sentence Patterns:When + Present Simple Tense Sentences, Sentence Present Tense, OrPresent Tense Sentences + when + Simple Present Tense Sentences
Examples:
When ice is heated, it melts.
(When the ice is heated, then the ice will melt)
Susan walks to school when she has enough time.
(Susan walking to school when he has a lot of time)
When the water is frozen, it freezes.
(When the water is frozen, the water would have frozen)
c. Imperative Sentence
Sentence Patterns:If + Present Simple Tense Sentences, Sentence command, orSentence Command + if + Simple Present Tense Sentences
Examples:
If you go to the Post Office, please mail this letter.
(If you go to the Post Office, please post this letter)
Do not come here if you can not.
(Do not come here if you can not)
Please call me if Ed phones me.
(Please call me if Eddie called me)
Note:"If" and "when" is used in the Real Conditional. "If" is used to describe something that is rare, while the "when" is used to describe the events that have regular or frequent.
Other Modals
Other Auxiliary capital that can be used in the conditional mode is can, shall, and may.
Examples:
If I bring the book, you can borrow it.
(If I take the book, you may borrow it)
You shall make-the report, if you face the problem.
(You must make a report if there is a problem)
If the teacher does not come, you may go home.
(If the teacher does not come, you can go home)
2. Condition Improbable
Condition Improbable often also referred to as "Present Unreal Conditional" or "Type II". This assumption is used to explain that a job or activity at this time may be done if requirements are met.
Sentence Patterns:If + Past Simple Tense Sentences, Sentence Past Simple Future Tense, ORFuture Simple Past Tense Sentences + if + Simple Past Tense Sentences.
Examples:
He would come if you invited him.
(He will come if you invite)
What would you do if She Came here?
(What would you do if he came here?)
She would help you if you told her the truth.
(He will help you if you tell the truth)
Were
On the assumption of this type, all subjects use "were".
Examples:
If I were a bird, I would fly in the sky.
(If I were a bird, I would fly in the sky)
I would forgive him If I were you.
(I'll forgive him if I were you)
She said that she would stay at home if she were me.
(He said that he would remain at home if he becomes me)
If
In this type, the word "if" can we lose. And instead, we put "were" or "should" at the beginning of the sentence.
Examples:
Should I invite her, she MIGHT be here.
(If I invited him, he might be here)
Were I not busy, I would accompany you.
(If I'm not busy, I will accompany you)
Were she at home, they would visit her.
(If he is at home, then they will visit)
Note:In this type we do not use the "when" because since we're talking about something that is not real or only a mereimagunation. "When" can not be used.
Examples:
I would buy that computer when it were cheaper. WRONG
(I'm going to buy a computer it when the price is cheaper)
I would buy that computer if it were cheaper. TRUE
(I'm going to buy a computer it if the price is cheaper)
Other modals
Other Auxiliary capital that can be used is could, Might and should on this Conditional type.
Example:
If I brought the book, you could borrow it.
(If I take the book, you may borrow it)
You should of make the report if you faced the problem.
(You must make a report if there is a problem)
If the teacher did not come, you MIGHT go home.
(If the teacher does not come, you can go home)
3. Impossible Conditional
Impossible Conditional or often referred to as "Past Unreal Conditional" or "Type III" expressed a supposition that is no longer possible to happen because it happened already passed. This type usually contains will regret what has happened in the past.
Sentence Patterns:If + Past Perfect Tense Sentences, Sentence Past Perfect Tense, ORPast Perfect Tense Sentences + if + Past Perfect Tense Sentences
Examples:
If we had known you were there last year, we would have written you a letter.
(If we knew you were there last year, we will write to)
He could have come here if you had invited him yesterday.
(He will come if you have invited yesterday)
Might they have employed me if I had had work experience.
(They probably would hire me if I have any experience)
IF
In this type, we can also remove the "if" by putting "had" at the beginning of the sentence.
Examples:
Had I had enough money, I would have given her a present.
(If I had money, I would have given him a gift)
Had he had studied hard, he could have passed the exam.
(If he actively learns, he can pass the exam)
Source: englishcarat.blogspot.com