灵鹊做题网希望高人能够说说can和be able to的区别还有两个例子
来源：学生作业帮 编辑：灵鹊做题网作业帮 分类：英语作业 时间：2024/04/19 07:29:00
希望高人能够说说can和be able to的区别还有两个例子
can 和 be able to
should和 ought to
must be 和may be的区别
这个三组词相互之间的用法有什么区别？有例子最好的。
can 和 be able to
should和 ought to
must be 和may be的区别
这个三组词相互之间的用法有什么区别？有例子最好的。
can 与 be able to
指过去某时或某个时刻设法做成某事,不用could,而用was\were able to,managed to do或succeeded in doing等.以下是几个例句:
I talked with her for a long time,and eventually I was able to\managed to make her believe me.我谈了很久,最终还是使她相信了我的话.
另外be able to有更多的时态.
Will you be able to camera the lecture tomorrow?你明天能把讲座录下来吗?
I'm sorry I haven't been able to answer your letter in time.真对不起我没能及时给你回信.
在否定句中或与感官动词连用时,could与was\were able to可以通用.
I could\was able to see them through the window.透过窗户我能看到他们.
I wasn't able to\couldn't catch the last train.我没能赶上最后一班火车.
ought与should
ought与should差别细微.should多表达自己的主观看法;ought to则多反映客观情况,在谈到法律、义务和规定（或要使自己的意见听起来像义务和法律一样有力）时使用.
You should\ought to go and see Mary some time.你应该找个时间去看看玛丽.
We ought to go and see Mary tomorrow,but I don't think we have time.
我们应该明天去看看玛丽,可我认为我们没有时间.
may be 与must be
may be 表示推测.
对现在或未来的可能性的判断.John is absent.He may\might be ill.约翰没来,他可能病了.
对可能正在发生的事进行推测.此时用may\might be doing结构.
Let's speed up.they may\might be waiting for us now.咱们得加快速度,他们或许正等着我们.
当表示机关、学校等的文书、公告里的“不得”、“禁止”时,用may not或mustn't表示,而不用cannot.
Any book may not be taken out of the library.任何书不得带出图书馆.
must be表示猜测时可以对现在、过去和将来进行猜测.其否定形式不能为mustn't,而是can't\couldn't.
对现在的猜测.此时常用“must+动词原形”结构,表示“一定”.
You must be ill.I can see it from your face.你准是病了,我从你的脸上可以看出来.
对可能正在进行的行为的猜测.此时常用“must be+doing"结构,表示"一定正在".
Something must be burning.I can smell it.一定有什么东西烧焦了,我能闻出来.
对将来的猜测.直接用“must+be doing"结构.
Bell must be leaving tomorrow.贝尔明天一定走.
对过去的猜测.对发生在过去的事情进行猜测时常用must have done或must have been doing结构
A对过去的猜测.You must have gone to bed late last night.Your eyes are red.你昨天晚上一定睡得很晚,你的眼睛红红的.
B对完成的猜测.You must have read this book.You know the story very well.你准读过这本书,你对这个故事很熟悉.
C对完成进行的猜测.You must have been waiting for us for a long time.你一定是等我们好长时间了.
还有别的意思,以上不是全部.
指过去某时或某个时刻设法做成某事,不用could,而用was\were able to,managed to do或succeeded in doing等.以下是几个例句:
I talked with her for a long time,and eventually I was able to\managed to make her believe me.我谈了很久,最终还是使她相信了我的话.
另外be able to有更多的时态.
Will you be able to camera the lecture tomorrow?你明天能把讲座录下来吗?
I'm sorry I haven't been able to answer your letter in time.真对不起我没能及时给你回信.
在否定句中或与感官动词连用时,could与was\were able to可以通用.
I could\was able to see them through the window.透过窗户我能看到他们.
I wasn't able to\couldn't catch the last train.我没能赶上最后一班火车.
ought与should
ought与should差别细微.should多表达自己的主观看法;ought to则多反映客观情况,在谈到法律、义务和规定（或要使自己的意见听起来像义务和法律一样有力）时使用.
You should\ought to go and see Mary some time.你应该找个时间去看看玛丽.
We ought to go and see Mary tomorrow,but I don't think we have time.
我们应该明天去看看玛丽,可我认为我们没有时间.
may be 与must be
may be 表示推测.
对现在或未来的可能性的判断.John is absent.He may\might be ill.约翰没来,他可能病了.
对可能正在发生的事进行推测.此时用may\might be doing结构.
Let's speed up.they may\might be waiting for us now.咱们得加快速度,他们或许正等着我们.
当表示机关、学校等的文书、公告里的“不得”、“禁止”时,用may not或mustn't表示,而不用cannot.
Any book may not be taken out of the library.任何书不得带出图书馆.
must be表示猜测时可以对现在、过去和将来进行猜测.其否定形式不能为mustn't,而是can't\couldn't.
对现在的猜测.此时常用“must+动词原形”结构,表示“一定”.
You must be ill.I can see it from your face.你准是病了,我从你的脸上可以看出来.
对可能正在进行的行为的猜测.此时常用“must be+doing"结构,表示"一定正在".
Something must be burning.I can smell it.一定有什么东西烧焦了,我能闻出来.
对将来的猜测.直接用“must+be doing"结构.
Bell must be leaving tomorrow.贝尔明天一定走.
对过去的猜测.对发生在过去的事情进行猜测时常用must have done或must have been doing结构
A对过去的猜测.You must have gone to bed late last night.Your eyes are red.你昨天晚上一定睡得很晚,你的眼睛红红的.
B对完成的猜测.You must have read this book.You know the story very well.你准读过这本书,你对这个故事很熟悉.
C对完成进行的猜测.You must have been waiting for us for a long time.你一定是等我们好长时间了.
还有别的意思,以上不是全部.