use 用法详解
1. use意为“用；使用；运用”，单三形式为uses，例如:She uses knife to cut apples.她用刀子切水果；过去式为used，如:Tom used my pen last night昨晚汤姆用了我的钢笔；现在分词为using，如:Look, your mother is using new spoon. 看，你妈妈在用新勺子。后跟动词不定式，结构为: use sth. to do sth. 使用某物做某事。例如: You can use my new dictionary to look up the words. 你可以用我的字典查单词。
2. 区分used to do, be used to do与be used to doing.
(1)used to do 意为“曾经”。eg: I used to be a teacher, now I am a doctor. 曾经我是老师，现在我是医生。
(2) be used to do意为“被用来做某事”。
eg: Pencils are used to write English. 铅笔是用来写字的。
(3) be used to doing. 习惯于做某事；适宜于做某事
eg: I used to live a small village, but now I am used to living in big citylife. 我曾经居住在农村，但现在我习惯大城市的生活。
https://www.doczj.com/doc/a813895458.html,e sth to do 和use sth for doing 的区别：