1) Use the appropriate form of the infinitive.
1 . They want (to take) to the concert by their father.
2 . I am glad (to do) all the homework yesterday.
3 . This plant is known (to produce) tractors.
4 . He wants his son (to become) a lawyer.
5 . The enemy army was reported (to overthrow) the defense lines and (to advance) towards the suburbs of the city.
6 . He seems (to know) French very well: he is said (to spend) his youth in Paris.
7 . You had better (to call) our distributors at once.
8 . We are happy (to invite) to the party.
9 . That firm is reported (to conduct) negotiations for the purchase of sugar.
10 . It seemed (to snow) heavily since early morning: the ground was covered with a deep layer of snow.
11 . He didn’t hear me (to knock) at the door.
12 . I want (to inform) of her arrival.
13 . Our sportsmen are proud (to win) the cup.
14 . He is known (to work) on the problem for many years.
15 . The representative of the firm asked for the documents (to send) by air mail.
2) Put “to” where necessary.
1. I think you ought … apologize.
2. Make him … speak louder.
3. Help me … carry this bag.
4. My son asked me … let him … go to the theatre.
5. I must … go to the country.
6. It cannot … be done to-day.
7. She asked me … read the letter carefully and … write an answer.
8. The man told me not … walk on the grass.
9. Let me … help you with your work.
10. She ought … take care of her health.
11. We had better … stop to rest a little.
12. I don’t know what … do.
13. He was seen … leave the house.
14. We have come … ask whether there is anything we can … do.
15. We heard the siren … sound and saw the ship … move.
16. I cannot … go there now, I have some work … do.
17. During the crossing the passengers felt the ship … toss.
18. You must make him … practice an hour a day.
19. He is not sure that it can … be done, but he is willing … try.
20. I looked for the book everywhere but could not … find it.
21. He said that she might … come in the evening.
22. She was made … repeat the song.
23. Would you rather … learn shorthand than typewriting?