Conditional Sentences

Conditional (sentence presupposition) explains that an activity contrary to other activities. The most common conditional is Real and Unreal Conditonal Conditonal, sometimes also called if-clauses.
Real Conditional (often also called the conditional Type I) which described the assume-if in accordance with the facts.
Unreal Conditional (often also referred to as Conditional Type II) which describes the supposition that no real or imaginative.
There is also conditional that the 3rd which is often referred to as Conditional Type III, is used as a regret that happened in the past and the zero conditional, used to express something that is definitely true.
Note: If the clause "if" is placed at the beginning of a sentence, we must use a comma. Conversely, if the clause "if" is behind, then there should be no comma
Zero Conditional
Used to express general truths. Used Tense Simple Present Tense usually
Formula
(IF Clause) (Parent Sentence)
If you heat water to 100C, it boils.
Or
(Parent Sentences) (IF Clause)
Water boils if you heat it to 100C,
Example:
• If you drop an apple, it falls. = An apple falls, if you drop it.
• If you do not do your homework, I will from be disappointed. = I will from be disappointed, if you do not do your homework.
Note: In this type, if often replaced with "Pls"
Conditional I
Used to express supposition based on the facts in the present or the future and this modality could happen. If the clause is usually in the form of the Simple Present Tense.

Formula
(IF Clause) (Parent Sentence)
If I see you tomorrow, I will of buy you a drink.
Or
(Parent Sentences) (IF Clause)
I will of buy you a drink if I see you tomorrow.
We often use unless which means' if ... no.
Formula
(IF Clause) (Parent Sentence)
Unless you hand in your homework, I will not mark it.
That is
If you do not hand in your homework, I will not mark it.
Or
(Parent Sentences) (IF Clause)
I will not mark your homework unless you hand it in..
That is
I will not mark your homework if you do not hand it in..
Note: We do not ever use a will, or will not in the IF clause.
Example:
• If I have time today, I will from my phone friend. = I will from phone my friend, if I have time today.
• If I go to England, I will from buy Some Cheddar cheese. = I will from buy Some Cheddar cheese, if I go to England.
Type II Conditional
Used to express an unreal situation in the present or the future. This type is used to express a hope. Tenses used in the IF clause is the Simple Past Tense.
Formula
(IF Clause) (Parent Sentence)
If I won the lottery, I would buy a new house.
Or
(Parent Sentences) (IF Clause)
I would buy a new house if I won the lottery.
Note: Do not use or wouldn't Would the IF clause.
Example:
If I were the resource you, I wouldn't do that. = I wouldn't do that, if I were the resource you.
If i had more time, I would do more on my websites. = I would do more on my websites, if i had more time.
Conditional Type III
Used to express a condition in the past are not likely to happen again. Often used to criticize or regret. Tenses used in the IF clause is the Past Perfect Tense.
Formula
(IF Clause) (Parent Sentence)
If i had worked harder, I would have passed my exam.
If i had worked harder, Could I have passed my exam.
If i had worked harder, I Should have passed my exam.
Or
(Parent Sentences) (IF Clause)
I would have passed my exam if i had worked harder.
Could I have passed my exam if i had worked harder.
Should I have passed my exam if i had worked harder.
Note: Do not use Would have or wouldn't have, etc. in Clause IF.
Example:
• If I hadn't helped you, Would you have failed. = You Would have failed, if I hadn't helped you.
• If it Had been sunny, We Could have gone out. = We Could have gone out, if it Had been.