1) I can speak two foreign languages.
2) She take my phone.
3) All the students can use the internet.
4) I could find the lost book.
5) You may take my camera with you.
6) You must do the work in time.
7) They ought to be more polite.
8) You should take this medicine three times a day.
9) We will be able to discuss this problem tomorrow.
10) We were allowed to wait for Mr. Flint in the sitting-room.
11) I always have to get up at six in the morning.
12) He is to do these exercises for the next lesson.
Примечание:
Для построения отрицательных и вопросительных предложений с оборотом to have to используются вспомогательные глаголы соответствующих времен.