be used to do sth.是什么意思

Question

如题所述

Answer 1

①【used to do sth.】：过去常常做某事（现在不做了） I used to go fishing everyday.
②【was used to do sth.是be used to do sth.的过去形式，用法一样】：某物被用来做某事 The pen is used to write letters.& The truck was used to transport goods.
③【be used for doing sth.】与上面的【be used to do sth.】都表示某物被用来做某事，只是介词不同 The pen is used for writing letters.
④【be used to doing sth.】表示习惯于做某事 I am used to getting up early in the morning.这个用法与【get used to (doing) sth. 】的用法和意思一样，都表示习惯于做某事

Answer 2

be used to do sth被用来做某事
如
This kind of knife is used to cut grass.

.
这种刀是用来割草的。

Answer 3

被用于做某事。
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