Вставь глагол "быть" в нужной форме (am, is, are)

1)i have to work hard to improve my english

2)joan doesn’t   have to go.she can stay here.

3)i’m   sorry   i’m late.i had to do the shopping.

4)i think the spacemen has known english.

5)does she have to read this rule?

6)tom doesn’t  have to use a computer.

7)you have to know english to understand people.

8)does mary have to help ann to study english?

9)what time do you have to get up?

10)has your teacher corrected your homework?  

1.you will never finish your work

2.you continue to do like this

3.i would make it another way+

4.i would leave to america

5.if i haven't come

6.we shouldn't go on refueling