|
发表于 2016-8-9 19:05:34
|
显示全部楼层
七:used to与would用法对比表
used to would
1.表示过去的动作、状态,重在与现在情况的对比,不一定要有时间状语。
I used to play cards a lot, but now I seldom play.
My hometown is not what it used to be. 1.只表示过去动作的重复,有明确的时间状语
I would go to see my grandfather on Sunday when he was in the middle school.
2.would 后只接表动作的动词,不接表认识或状态动词
He used to be nervous in the exam.
2.表示过去的习惯有时可互换:
When we were very young, we used to / would go skating every winter.
2. 表示过去的次数时,不能使用:
( √)We went to the Great Wall five times when we were young.
( X ) We used to go / would go to the Great Wall five times when we were young.
注:used to do的否定式:usedn’t to do 或didn’t use to do (usedn’t也可写作usen’t)
疑问式: Did you use to do ? Didn’t you use to do?
Used you to do? Usedn’t you to do?
情态动词表推测
情态动词表推测的意义:
1、大多数情态动词(除表‘能力、许可、意志’外),都可以表示推测,其程度有差异。按其可能性程度的高低排列为:
Must ﹥will ﹥would ﹥ought to ﹥ should ﹥ can ﹥ could﹥ may ﹥ might
肯定 完全可能 很可能 可能 有可能
2.注意区分情态动词的否定的含义:
may not或许不、可能不 might not可能不 can’t 不可能
mustn’t不许、禁止 shouldn’t不应该 needn’t 不必
3.情态动词表推测具体运用:情态动词可以对现在、进行、过去推测
S主+情态动词+be+adj 对“性质”“特征”的推测
S主+情态动词+be+n 对“职业”“事物”的推测
S主+情态动词+V原 对经常性行为的推测
S主+情态动词+be+V-ing 对进行着的行为的推测
S主+情态动词+have+PP 对过去的行为的推测
特别提醒:情态动词表推测时
1、 can只能用于否定句和疑问句
2、 must只能用于肯定句(它的否定句和疑问句其实就用can来代替了)
3、 如句中有情态动词 + 完成时,定是对过去的推测 。
4、 句中如有表示不肯定的话语,如:I am not sure; I don’t know 之类,常选may /might的各种形式
4. 记住下面几组表示反劝的特殊的表推测的形式
1). could + have + PP表示本来能做到,但事实上没有做到。 He could have finished the task on time, but the heavy snow came.
2). couldn’t +have + PP表示本来不能做到,但已经做到了。 She could not have covered the whole distance, but in fact she arrived ahead of time.
3) needn’t + have + pp表示本不必做的,但已经做到了。 She needn’t have attended the meeting yesterday, but she did.
4.) should/ought to +have + PP表示 该做而没有做 The plant is dead. I should/ought to have given ot more water.
5) shouldn’t/ oughtn’t to +have + PP表示 不该做而做了。 You oughtn’t to / shouldn’t have taken her bike without permission.
5. 记住下面对比:
must只能用于肯定句(它的否定句和疑问句其实就用can来代替了)
1.must + have + PP 表示对过去肯定的推测,译为“一定是,准是” The road is wet. It must have rained yesterday.
2.can + have + PP 表示对过去的推测(限于问句中) Can she have said so? 他可能这样说吗?
3.can’t + have + PP 表示对过去的否定推测 He cannot have said such a foolish thing.
情态动词表推测的反意疑问句
情态动词表推测的反意疑问句,简单来说,就是以情态动词后的时态为淮,如句子里有明确的时间状语,则以其为准。以 must 为例:
eg. 1. You must be hungry now, aren’t you?
2. He must be watching TV , isn’t he ?
3 Tom must have lived her for a long time, hasn’t he ?
4. She must have arrived yesterday, didn’t she?
注:如选择题中(以She must have arrived yesterday, didn’t she?为例)既有didn’t she又有hasn’t she则以didn’t she?为最佳答案。
以上就是小升初英语情态动词的对比解析及用法,希望对大家有所帮助。最后祝大家在宁波小升初中能够取得一个优异的成绩,进入理想中的学校。
编辑推荐:
2012年宁波小升初英语必考语法及详解
宁波小升初英语书面表达优秀范文
宁波小升初英语固定句型搭配汇总
2012宁波小升初英语优秀作文范文十五篇
2012宁波小升初英语考试主要内容
|
|