新概念一課一練精華版1冊
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（
C
）7. You ______ listening to me as your eyes ______ outside.
A. can't be; looked
B. can't have been; is looking
C. can't have been; were looking
D. can't be; was looking
答案：7. C
解析：“你的眼睛當時正看向外面”，說明你不可能一直在聽我說話，是對過去正在進行的動作的否定推測，用can't have been listening，“eyes”是復數，“look”用were looking，選C。
Ⅲ 用括號中所給詞的正確形式填空。
The policeman wants Gary
to stop
his car. (stop)
Ann was telling Gary
to drive
slowly. (drive)
You had better
forget
about it. (forget)
My son is correcting the mistakes in his exercise book
carefully
. (careful)
Ann must
have been dusting
the table when I knocked at the door. (dust)
The policeman
was doing
eighty when he overtook Gary. (do)
All the students passed the exam. The papers can't
have been
very difficult. (be)
You must have been
asleep
. (sleep)
答案：to stop
解析：“want sb to do sth”表示“想要某人做某事”，填to stop。
to drive
解析：“tell sb to do sth”表示“告訴某人做某事”，填to drive。
forget
解析：“had better+動詞原形”，填forget。
carefully
解析：“carefully”是副詞，修飾動詞correcting，填carefully。
have been dusting
解析：“when I knocked at the door”表示過去的某個時間點正在進行的動作，用過去進行時，“must have been+現在分詞”，填have been dusting。
was doing
解析：“when he overtook Gary”表示過去的某個時間點正在進行的動作，用過去進行時，“do eighty”表示“以80英里/小時的速度行駛”，填was doing。
have been
解析：“can't have been”表示對過去情況的否定推測，填have been。
asleep
解析：“be asleep”表示“睡著的”，填asleep。
Ⅳ 按要求完成句子。
1. We had better go there.（變為否定句）
We ______ ______ ______ ______ there.
2. I think the children were doing their homework quickly.（同義句）
The children ______ ______ ______ ______ their homework quickly.
3. I don't think he was in the library.（同義句）
He ______ ______ ______ in the library.
4. The policeman's waving to you.（對畫線部分提問）
______ ______ the policeman ______?
5. I must have been dreaming.（變為否定句）
I ______ ______ ______ ______.
6. You must have been driving at seventy miles an hour.（對畫線部分提問）
______ ______ ______ you ______ ______ ______?
答案：1. had better not go
解析：“had better do sth”的否定是“had better not do sth”，填had better not go。
2. must have been doing
解析：“I think the children were doing...”表示對過去正在進行的動作的肯定推測，用must have been doing，填must have been doing。
3. can't have been
解析：“I don't think he was...”表示對過去情況的否定推測，用can't have been，填can't have been。
4. What is, doing
解析：對“waving to you”提問，用what，“be+現在分詞”，填What is, doing。
5. can't have been dreaming
解析：“must have been”的否定是“can't have been”，填can't have been dreaming。
6. How fast must, have been driving
解析：對“at seventy miles an hour”提問，用how fast，填How fast must, have been driving。
Ann: Look, Gary! That policeman's
waving
to you. He wants you to
stop
.
Policeman:
Where
do you think you are? On a race
track
? You must
have
been
driving
seventy miles an hour.
Gary: I can't
believe
it
.
答案：waving, stop, Where, track, have been driving, believe it
解析：第一空“向你揮手”用waving；第二空“想要你停下”用stop；第三空“你以為你在哪里”用Where；第四空“賽道”用track；第五、六、七空“一定是以70英里/小時的速度行駛”用have been driving；第八、九空“我不敢相信”用believe it。
