If-without

But for your help, we couldn't do this.

--> If................................................, we couldn't do this.

But for your help, we couldn't have done this.

--> If ....................................., we couldn't have done it.

But for your help, we couldn't have done this.

--> If it ....................................., we couldn't have done it.

Without your contribution, she wouldn't have been able to win.

--> If ...................................................., she wouldn't have been able to win.

Without the rain, they couldn't have a good crop.

--> If......................................................., they couldn't have a good crop.

without the sun, everything would die.

--> If ............................, everything would die.

But for the stars, he couldn't see the way.

--> If ................................ the stars, he couldn't see the way.

He missed the bus. Otherwise, he (arrive)............................................on time.

They don't practice often. Otherwise, they (win).....................................

Tom didn't study hard. Otherwise, he (pass)..............................the exam.