0) if i cook my sister helps me
If i am late my friends wait for me
If he sings everyone listens to him
1) if you are late i will wait for you
Unless you come back i won't have dinner
If you hurt me i will never talk to you again
2) if i were you i would do the same
If you knew about it you would do it differently
If i took camera i would do pictures
3) if i had known about it before i would have gone earlier
If you had been there you would have asked me
If she had told me i would have brought it