祈使句+反意疑问句
When you have finished with the book,
don’t forget to return it to Tim, ________? A. do you B. will you C. don’t you D. won’t you
VIII.可兼做行为动词的情态动词：need 、 dare 情态动词 (+动词原形) 行为动词
VI. could / might / would 表委婉 Might I watch TV after super? Yes, you
______. A. may B. could C. would D. might Could / Might I use your bike tomorrow morning? --- Yes, you can /may. (否定: No, I’m afraid not)
表示推测——情态动词的重要用法. 情态动词 肯定的推测
对将来 对现在 对过去 ~+V ~+V ~ + have done/ must/should常见must be must be doing have been doing 可能的推测
~
+ V.
may, might
否定的推测
+ V. ~ + have done + be doing /have been doing 可以用not表示“可能不”
IV. “mustn’t + 动词不定式一般式” 表示“不允许”，是说话人强有力的
劝告或命令 A. mustn't B. can't C. won't D. needn’t
Must I hand it next week? No, you_____ ?
V. could V.S. was/ were able to was/ were able to表示过去有能力并且
在反意疑问句中，当附属部分含有表示推测意义
的must时，疑问部分的助动词应与must后面的动 词在非推测情况下的用法保持一致。
He must be a worker, ______ he? isn’t You must have learned English for many
years, ________haven`t you? It must have rained last night, _______ it? didn’t He must have arrived by yesterday morning, _________? hadn’t he
The sentence that expresses OFFER is A. I’ll get some drink. What’ll you have? B. Does she need to book a ticket now? C. May I know you name? D. Can you return the book next week?
1.无人称和数的变化; 多用于肯定句; need 2.尤其用于： (sb.) need to do *否定句及疑问句中; dare to do *在if/whether之后; . (sth.) need to be *或与hardly, never, no one, nobody连用; done dare 3.常以needn’t 和daren’t (sth.) need doing 的形式出现; 4.dare有其过去时dared.
III. “may / might / must + 不定式完成式” 表示对过去事物的怀疑和推测（可用
于肯定句） She ____ fifty or so when I first met her at a conference. A. had been B. must be C. has been D. must have been
成功地做了某事; could表示过去一般的 能力， 但不表示做或未做某事.
The fire spread through the hotel quickly
but everyone __________ get out. A. had to B. would C. could D. was able to
肯定句、否定句、一般疑问句）；表 示过去某种动作可能发生，但是由于 某种原因而没有做到的事情。 We could _____ him with a detached house when he came, but he had specifically asked for a small flat. A. provide B. have provided C. not provide D. not have provided
~
can’t, couldn’t
~
+V.
~
+V. + be doing V. + be doing
~+
~
+ have done
/ have been doing
~+
ห้องสมุดไป่ตู้
疑问的推测
~+
V.
have done
can, could
II. “can/ could +不定式完成式” 表示对过去发生事情的推测（可用于
情态动词
I. “needn’t＋完成时态”结构 didn’t need + 不定式一般式：动作还未
发生 needn’t ＋ 不定式完成式：动作已经发 生 You _____ Jim anything about it. It was none of his business. A. needn’t have told B. needn’t tell C. mustn’t have told D. mustn’t tell