English: Conditional Sentences

Hello visitors of the Revisioning Blog!(Though I call this Learning Blog) I will be posting this 'Conditional Sentences' post, it tells you of the different type of posts.This post is dedicated to my classmate who was unsure of the types of conditional questions, and I could also revise from it when I have no books.
First type of conditional sentences
To talk about something we will do in the future or something that is likely to happen really happened, we use will + verb. Use simple past tense in the 'if' half of the sentence.
Example: If I keep feeding you. I will not be able to feed the poor.

Sometimes 'unless' is used instead of 'If......not'. Do not use not in the 'unless' half of a conditional sentence; use not in the second half of the same sentence.
Example of usage of 'unless': Unless people accept the truth of my story, I will not come out of hiding.
Example of usage of 'If......not': If people do not accept the truth of my story, I will not come out of hiding.


Second type of conditional sentences
To talk about a situation that is not likely to happen or that is unreal, use would + verb. Use the simple past tense in the 'if' half of the sentence.


Examples: If what the children said about their stepmother was true, they would not dare return home.
If I wanted to eat meat, I would choose something other than such bony creatures.


In the second type of conditional sentences, were, weren't, was and wasn't can be used for I, he, she and it.
Example: If I were a cow, I would munch grass all day.
If I was a cow, I would munch grass all day.
When writing, we use 'I were',when speaking, both 'I was' and 'I were' are acceptable.  

Use were after I when we want to tell somebody what we think should be done, or giving opinions.
Example: If I were you, I wouldn't let strange children eat my house!

Third type of conditional sentences
Sometimes we talk about things that happened or did not happen in the past. We think of what would have happened if something did/did not happen.
The 'if' half of the sentence talks about things that have happened. It is too late to change these things. Use had + past participle. The 'would/wouldn't have' half of such sentences is to say what would have happened if things have been different in the 'if' half of the sentence. Use would/wouldn't have + past participle. 

Examples: If I had not made such a delicious house, I would not have been in this mess.

They would have left my house sooner if I had not cooked such delicious food.
To talk about a situation that did/did not happen in the past, use if + verb in past perfect tense in the 'if' half of the sentence. In the other half of the sentence, use would have + past participle of verb.

Use 'if only' to express regret.
Example: If only I had not listened to those wicked children in the first place, I would not be in this situation now.