第13 讲 情态Microsoft Word 文档

1 第第 13 讲讲 情态动词情态动词 1 英语情态动词英语情态动词 can could may might will would shall should must need have to ought to 情态动词没有人称 数的变更 即情态动词加 do A 比较比较 can 和和 be able to 1 can could 表示能力 可能 过去时用 could 只用于现在式和从前式 could be able to 能够用于各种时态 They will be able to tell you the news soon 他很快就能告诉你消息了 2 表示成功地做了某事时 只能用 was were able to 不能用 could He was able to flee Europe before the war broke out He managed to flee Europe before the war broke out could 不表示时态 内容来自 1 提出委婉的恳求 留神在答复中不可用 could Could I have the television on Yes you can No you can t 2 在否定 疑问句中表示推测或猜疑 He couldn t be a bad man B 比较比较 may 和和 might 内内容来自 1 表示请求允许 表示 推测 He might be at home May I come in 初中英语情态动词注意 might 表示推测时 不表示时态 只是可能性比 may 小 may might as well 后面 do 意为 不妨 If that is the case we may as well try Peter come with us tonight but he isn t very sure yet A must B may C can D will C 比较比较 have to 和和 must 1 have to 表示客观的须要 must 表示谈话人主观上的看法 既主观上的必要 My brother was very ill so I had to call the doctor in the middle of the night He said that they must work hard 2 have to 有人称 数 时态的变化 而 must 只有一种形式 He had to look after his sister yesterday 3 在否定构造中 don t have to 表示 不必 mustn t 表示 禁止 2 You don t have to tell him about it You mustn t tell him about it 4 must 表示推测表示推测 1 must 用在肯定句中表示较有把握的推测 意为 一定 2 must 表对现在的状态或现在正产生的事件的推测时 must 后面通常接系动词 be 的本相或举动 动词的进行式 You have worked hard all day You must be tired 内容来自 He must be working in his office 3 否定推测用 can t If Tom didn t leave here until five o clock he can t be home yet D should 跟跟 ought to ought to 在语气上比在语气上比 should 要强 要强 should 和 ought to 都为 应当 的意思 可用于各种人称 Ought he to go Yes I think he ought to 表示命令时 语气由 should 应该 had better 最好 must 必须 渐强 E had better 表示表示 最好最好 had better 它后面要跟动词原形 had better do sth had better not do sth It is pretty cold You d better put on my coat 内容来自 She d better not play with the dog F will 和和 would 1 would like Would like to do want to 想要 为固定搭配 Would you like to go with me 表示委婉语气 2 Will you Would you like Would you like some cake G 情态动词的回答方式情态动词的回答方式 问句 肯定回答 否定回答 Need I go home now Yes you must No you needn t Must you do your work now Yes I must No I don t have to needn t 1 Could I borrow your dictionary Yes of course you A might B will C can D should 2 Shall I tell John about it No you I ve told him already A needn t B wouldn t C mustn t D shouldn t 3 Don t forget to come to my birthday party tomorrow A I don t B I won t C I can t D I haven t 内容来 H 比较比较 need 和和 dare m 两词既可做实义动词用 又可做情态动词用 作为情态动词 两者都只能用于疑难句 否定句跟 条