你好！be used to do…是一個被動語態短語，意為“被用來做…”，例句如下：
Nowadays， mobile phones are more and more used to help us work.現在，行動電話越來越多地用來幫助我們工作。
除此之外，關於“used”還有以下兩個固定搭配：
1、used to do…過去常常做某事…
2、be used to doing…習慣於做某事…
例句：My grandparents used to live in the countryside， but now they are used to living a happy life with us in the city centre.
我的祖父母過去居住在鄉下，但現在他們習慣於和我們居住在市中心。
beusedtosth例句
be used to do sth.被用來做某事
The wood is used to make desks.
This powerful drug is used to tranquilize patients undergoing surgery.
This kind of material is used to make medical machine.
Newspaper that you have read can be used to stick on the wall.
