江西成人高考高起点英语语法归纳与练习十五(3)

来源:
江西成考网
发布日期
2017年04月19日

摘要:    lesson 15  情态动词(二)     内 容 提 要     情态动词有can(能),may(可以),must(必须),have to(不得不),ought to(应该),dare(敢),used to(过去经常),had better(最好),would rather(宁愿)。在肯定句中它们后边都要接 动词原形 .在否定句中,can,may,must和dare后边加not;have to和o

租。

    “couldn't+have+ED分词”还表示无论如何也不可能或没有做到

    I couldn't have called you. I wasn't near a telephone. 反正我也不可能给你打电话,我附近没有电话。

    5) “We didn't see him at the lecture yesterday.”“He it.”

    [A] mustn't attended[B] couldn't have attended[C] would have not attended[D] needn't have attended

    六、needn't+have+ED分词:表示对过去不必做的事情却做了,可译为“其实不必”

    6) You all these parcels yourself.The shop would have delivered them if you had asked a shop assistant.

    [A] didn't need to carry[B] needn't have carried[C] needn't carry[D] didn't need carry

    七、used to 表示过去的习惯动作或状态,现在已不存在,在否定陈述句中,一般用didn't use to,也可用used not to;在疑问句中用“Did…use to”。used to还可never,often,always等连用。注意used to与be used to的不同,后者表示be accustomed to “习惯于某种状态”,而且跟接名词或ING形式,而used to后接动词原形,试比较

    He used to drink. 表示“他过去经常喝酒”而现在不喝了。

    He is used to wine (He is used to drinking wine) at each meal.

    表示“他现在已养成习惯,每顿饭喝点葡萄酒。”

    八、had better表示“最好……”,后接动词原形,其否定式为had better not+动词原形

    You had better not follow his behavior. 你最好不要学他。

    九、would rather 意思是“宁愿”,表示选择。它有两种用法,一是在肯定句中