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Modals

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We use can to say that someone has the ability or opportunity to do something. The negative of can is cannot (contraction: can t). Can you swim? He can play the guitar. It s nice today. We can sit in the garden. I can t open this bottle. could for the italicized verbs if possible. 1. We had a good time yesterday. We went to the zoo. The children enjoyed themselves very much. They saw polar bears and elephants. (No substitution of could is possible.) 2. When I lived in St. Louis, I went to the zoo whenever I wanted to, but now I live in a small town. | have done it! 35. It is strange that he should have said it. 36. You might/could be more considerate to you sister. 37. There's nothing to do, so I may as well go to bed. 38. It is surprising that he should be so foolish! 39. He would often call on us. 40. You say you will not do it, but I say you shall (do it). 41. We must obey the laws. 42. You can't (mustn't) park in front of this gate. 43. If he says so it must be true. 44. Shall we go out for a walk? 45. They should be there by now. 46. This'll/must be our train. 47. The drawer will not open. 48. He left at 7.00. He ought to be here soon. 49. The students are not supposed to take the books out of the reading room. 50. When am I to come? 51. Not a cloud was to be seen. 52. They weren't at home when I came. Evidently they hadn't been expecting me. 53. Our football players are in good shape. They are sure/bound to win the match. 54. Why aren't you applauding? Evidently you don't like her singing. 55. The child won't eat anything. — He may not be hungry. 56. They are close friends. She can't/couldn't have failed to help him. 57. Your son might have been more careful. He could have knocked down my child. 58. He might not have heard the news. 59. He might/could have arrived in time if he had run quicker. 60. Will you please post the letter without delay? 61. After the exams you are to take all the books to the library. 62. In my opinion, she should be elected because she is honest, clever, and competent. 63. We can't wait any longer! Something must be done immediately!