be able to和able to区别？

一、be able to和able to区别？

be able to 能够

a. 位于助动词后。

b. 情态动词后。

c. 表示过去某时刻动作时。

d. 用于句首表示条件。

e. 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.

二、should be able to 和will be able to 区别？

should be able to 应该可以做到，应该能够……应能…… “应该能够”意味着可能有也可能没有能力并且会尝试做某事（此处暗示了信心）

双语例句：We should be able to wangle it so that you can start tomorrow.我们应该能设法安排你明天启程。

“Will be able to”翻译为将会有能力做某事.强调将来的动作能力.

双语例句：He will be able to sing this song in English in a few minutes, too.几小时之后，他也能用英语唱这首歌。

三、able to和be able to的区别？

No one could answer the question.没人能回答这个问题。（这里could可用was able to 代替）When he grows up, he will be able to support his family.他长大后就能养家了。

Frank is ill. He hasn't been able to go to school for one week.弗兰克病了，已经一周没去上学了。

I'm sorry for not being able to help you in time.

四、be able to和could able to的区别？

could是情态动词，后跟动词原形，而able是形容词，所以没有could able to的说法。

而 be able to 则可根据需要使用多种时态，还可以和一些情态动词连用，或用作动词不定式等非谓语形式。could是can 的过去式。

I haven't been able to sleep recently. 最近我睡不着觉。

He can swim. 他会游泳。

He couldn't be a bad man.他不大可能是

五、be able at doing和be able of doing的区别？

be afraid to do与be afraid of doing都可以表示“害怕”、“不敢”，但是，前者着重“因害怕而不敢做某事”，后者表示“担心某事可能发生”。

详解：

1、两个短语都有“不敢去做某事”的意思，但be afraid to do sth.真正的意思是“害怕做某事”，也就是主语对做某事内心感到恐惧；

2、be afraid of doing sth.表示主语内心里不情愿做某事，也可以说是不希望发生某事，但自己不一定能避免它。

例句：

1、He was afraid to go out alone at night.(他害怕晚上独自外出。暗含的意思是“他对于晚上独自外出缺乏安全感”。)

2、 He came late to school and was afraid of being scolded by the teacher.(他上学迟到了，害怕被老师吵。暗含的意思是“他不情愿被老师吵”。)

3、用“不敢.......”来辨别这两个短语很能说明问题。

He is afraid of being beaten by his father.他怕被他爸打。（不是他敢不敢的问题，他是不情愿。）

He is afraid to touch the snake.他不敢碰那条蛇。（他内心里恐惧蛇。）

六、be able用法？

be able 后加to意思是能够

People will be able to plan responsibly.

人们将能够负责任地进行规划.

希望我的回答对你有帮助哦