Rule 1 : It is time time + for+ personal object + to + verb( present form )
Example:
It is time for us to attack the enemy
It is time for them to start the work.
Rule 2 : It is time + subject + verb ( past form ) + ......
Examples :
It is time we went home
It is time they earned their livelihood .
Rule 3 : Present Indefinite + as if/ as though + past indefinite
Examples :
He tells the story as if he knew it
He runs fast as though he were a mad man
They donate money as if they were rich man
Rule 4 : Past Indefinite + as if / as though + past perfect
Examples :
He told the story as if he had known it .
She proceeded as though I had not spoken .
Rule 5 : If - Present Indefinite + future indefinite tense
Examples :
If it rains , we shall not go
he wants , I shall help him
If you play in the rain , you will catch cold
Rule 6 : If + Past Indefinite + would / could + verb ( present form )
Example:
If he came, i would go.
If they wanted , we would help him.
If i had typewriter, i would type the letters.
Rule 7: If + Past Perfect+would have/could have+verb(past participle form)
Example:
lt i had seen him, I could have told him the news
If they had started earlier, they could have got the train
lf she had tried, she would have succeeded.
Rule 8: Had+ Verb +Past Participle Form + would have/could have +verb (past participle. form)
Examples:
Had I seen him, I would have given him the news
Had he wanted, they would have helped him.
Had i possessed a vast property, I would have established a college.
Rule 9: lf+ Subject + were + would + verb (present form)
Examples:
If i were a king, I could help the poor.
lf i were you, I would not do this
Rule 10: Present/Future Indetinite Tense + when/after +present perfect.
Examples:
You can go to sleep when, you have taken your dinner
You will return me the book after, you have finished reading it.
He will swim after, he has changed his dress.
Rule 11: Would that/ I wish + were+
Examples:
I wish I were a King
Would that he was alive today.
Rule 12: Would you mind + verb(ing) +...?
Example:
Would you mind taking a cup of tea?
Would you mind opening the door?
Rule 13: lt is time + to + verb (present form) +
Examples:
It is time to start the work
It is time to leave the place