1. It is easy to be wise after the event.

→ to be: sau “It is + adj” thường dùng to-infinitive.

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2. Do you wish to make a complaint?

→ to make: sau wish là to-V.

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3. We don't want anybody to know that we are here.

→ to know: sau want sb to V.

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4. If you can't remember his number you'd better look it up.

→ remember: động từ thường → bare infinitive không dùng.

→ look: sau had better là bare infinitive.

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5. I want her to learn Esperanto: I think everybody ought to know it.

→ to learn, to know: theo sau want sb to V, ought to V.

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6. He is said to be the best surgeon in the country.

→ to be: câu bị động của people say he is... → He is said to be...

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7. Visitors are asked not to feed the animals.

→ not to feed: bị động của ask sb to V, phủ định thêm not.

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8. Could I see Mr Pitt, please? - Would you like to speak to his secretary?

→ see: sau could I là bare infinitive.

→ to speak: sau would you like là to-V.

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9. It's better to travel hopefully than to arrive.

→ to travel, to arrive: sau It’s better to V than to V.

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10. He should know how to use the film projector, but if he doesn't, you'd better show him.

→ know: sau should là bare.

→ to use: sau how dùng to-V.

→ show: sau had better là bare.

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11. He was made to sign a paper admitting his guilt.

→ to sign: bị động của make sb V → was made to V.

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12. I heard the door open and saw a shadow move across the floor.

→ open, move: sau see / hear + O + V (bare).

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13. He tried to make me believe that he was my stepbrother.

→ to make: sau try là to-V (cố gắng làm gì).

→ believe: sau make sb V → bare.

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14. As we seem to have missed the train, we may as well go back to the house.

→ to have missed: sau seem là to-V, dùng perfect vì hành động đã xảy ra.

→ go: sau may as well là bare.

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15. I felt the house shake with the explosion.

→ shake: sau feel + O + bare infinitive.

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16. He told me to try to come early.

→ to try, to come: sau tell sb to V và try to V.

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17. Before he let us go, he made us promise not to tell anyone what we had seen.

→ go, promise: sau let/make sb V → bare; not to tell: sau promise to V, phủ định.

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18. Would you like to come in my car? - No, thanks. I'd rather walk.

→ to come: sau would like → to-V.

→ walk: sau would rather → bare.

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19. I advised him to ask the bus conductor to tell him where to get off.

→ sau advise sb to V, và cả 2 chỗ sau là động từ chỉ mục đích nên dùng to-V.

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20. It is better to put your money in a bank than to keep it under your bed.

→ to put, to keep: giống câu 9, cấu trúc It’s better to V than to V.

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21. He doesn't even bother to read letters, let alone answer them.

→ to read: sau bother là to-V.

→ answer: sau let alone là bare.

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22. The bank robbers made the cashier show them how to open the safe.

→ show: sau make sb V → bare.

→ to open: sau how là to-V.

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23. If you knew he was wrong, why didn’t you say something? – I didn’t like to say anything...

→ say: sau didn't you là bare.

→ to say: sau like có thể dùng to-V hoặc V-ing, nhưng để chỉ hành động cụ thể → to say.

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24. It’s better to be sure than sorry.

→ to be: giống câu 9 và 20.

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25. What do you want me to tell him? – Tell him that any time he cares to call, I shall be delighted to discuss the matter.

→ to tell: sau want sb to V

→ to call, to discuss: sau care và be delighted → dùng to-V.

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26. Did you remember to give him the money? – No, but I’ll see him and promise not to forget.

→ to give: hành động cần nhớ làm.

→ see: sau will là bare.

→ not to forget: sau promise to V (phủ định).

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27. I saw the driver open his window and throw a box into the bushes.

→ Sau see sb V → dùng bare.

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28. That is far too heavy for one person to carry; let me help you.

→ to carry: sau “too ... for sb to V”.

→ help: sau let me V → bare.

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29. I was afraid to pick up the revolver as I don't know how to handle firearms.

→ to pick, to handle: sau afraid và how dùng to-V.

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30. I saw the plane crash into the hill and burst into flames.

→ Sau see sth V, dùng bare.

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31. There is nothing to do but wait till somebody comes to let us out.

→ to do, to let: theo cụm.

→ wait: sau “but” nếu chủ từ giống → dùng bare.

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32. He heard a cock crow in a neighbouring village.

→ Sau hear sth V → bare.

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33. You may as well tell us the truth. It will be easy to check your story.

→ tell: sau may as well → bare.

→ be: sau will → bare.

→ to check: sau easy → to-V.

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34. The American said he had seen nine presidents come and go. – He must be a very old man.

→ come, go: sau see sb V → bare.

→ be: sau must → bare.

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35. It is up to you to learn the laws of your own country.

→ sau It is up to sb → dùng to-V.

36. Would you rather be more stupid than you look or look more stupid than you are?

→ Sau would rather → bare.