1) I will go to the theatre if I buy tickets.
2)If she does not come in time they will be late for the concert.
3)If I get tickets for the evening performance in advance I will ring you up.
4)He will write a letter today if he has free time.
5) Will you call me up if you come back early?
6)If you do not tell me the truth I will never speak to you.
7)If you go to bed immediately we will take you to the cinema tomorrow.
8)If they take a taxi they will not miss the train.
9)If you lend him the book he will read it quickly.
Все предложения относятся к условным предложениям Первого типа - Conditional I
1) We had to leave early not to be late for school.
2) My brother had to
do his homework because he was the
teacher's pet.
Мой брат должен был делать домашнюю работу, так как он был любимчиком учителя.
Или
My brother didn`t have to do his homework because he was the
teacher's pet.
Мой брат не должен был делать домашнюю работу, так как он был любимчиком учителя.
3) In the past, children had to
obey their parents.
4) Did you have to pay for your ticket?
5) It rained all day on Sunday. I was really glad that I didn`t have to go
to school.
6) A hundred years ago, people didn't have washing machines, so
they had to do all the washing by hand.
7) Because of the snow last winter a lot of people had to spend
the night in their cars.
8) When we went to Spain last year, we didn`t have to speak Spanish,
because a lot of people could speak English.
9) Did you have to ask the permission from your dad when you were ten?
Объяснение: