•第六章 情态动词和虚拟语气 •△ 情态动词和虚拟语气讲解△•一、情态动词•( 一 ) 情态动词的基本用法•1 . can / could•(1) 表“能力”。•【例 1 】 Just be patient.You ________ expect the world to change so soon.(2010· 全国Ⅰ )•A . can't B . needn't•C . may not D . whether•答案 A •【例 2 】 We ________ eat in a restaurant because none of us had any money on us.•A . can't B . couldn't•C . may not D . might not•答案 B•(2) 表“许可”。回答 could 的提问常用 can ,一般不用 could 。 •【例 3 】 — Could I use your bike?•—Yes, surely you ________.•A . might B . will C . can D . could•答案 C•(3)could 一般只表过去的能力;若表示过去的能力得到了实施,一般用 was / were able to ,不用could 。 •【例 4 】 The fire spread throughout the hotel very quickly but everyone ________ get out.•A . had to B . would•C . could D . was able to•答案 D •2 . may / might•(1) 表“许可” ( = can) 。若表示“不可以、禁止”,用 mustn't 或 can't 。回答 might 的提问常用 may ,一般不用 might 。•【例 5 】 — ________ I take the book out? •—I'm afraid not.(2010· 四川 )•A . Will B . May C . Must D . Need•答案 B •【例 6 】 — Might I use your pen?•—Yes, of course you ________.•A . may B . must C . could D . might•答案 A•【例 7 】 — May I watch TV now? •—No, you ________.•A . can B . mustn't C . couldn't D . mightn't•答案 B•(2)may 表“祝愿”,置句首,主谓要倒装。 •【例 8 】 Good luck to you, and ________ all your wishes come true!•A . can B . may C . must D . might•答案 B •3 . must / have to•(1) 表“必须”。 must 强调主观看法; have to 强调客观需要。•【例 9 】 ① This is a bad party—We really ________ go.•②This is a lovely party, but we ________...