Dưới đây là các dạng đúng của động từ trong ngoặc:

61. If I **knew** his telephone number, I'd give it to you.
62. I **have been working** at my report since Monday. Now I **am writing** the conclusion.
63. I **met** your brother at Green Street this afternoon.
64. My clothes are not in the room. They **have taken** them away.
65. Mr. Jones **changed** five jobs before he moved to London.
66. I was the last to leave the office. Everybody else **had gone** home.
67. We decided not to go out because it **was raining** quite hard.
68. Laura was out of breath. She **had been running**.
69. I never **see** anyone more punctual than your brother.
70. By the end of this term I **will have read** twelve volumes.
71. The police **had heard** of the theft by this time.
72. On the fourth of next month, he **will have been** in prison for ten years.
73. I hope they **will have repaired** this road by the time we **come** back next summer.
74. By next winter they **will have built** four houses in this field.
75. "You **have been** here before?" - "Yes, I **spent** my holidays here last week."
76. I am feeling sick. I ate too much. I shouldn't **have eaten** so much.
77. He is only 35 but he has started losing his hair already. He **will have lost** it all by the time he is 50.
78. It is time we **did** something to stop road accidents.
79. I sat down at the desk and **wondered** why my father's letter **had not arrived** yet.
80. Mrs. Abbott **was walking** home from work when she **saw** a child fall off the bridge.
81. When you come back, I **will have finished** all the housework.