advise, allow, permit, forbid用法比较

used to,be/get used to doing,be used to do的用法区别

used to do 过去常常…… be/get used to sth./doing sth.. 习惯于…… be used to do 被用来做……

 (1) used to do sth. 过去常常……(现在已不如此)

We used to grow beautiful roses.

注意：否定句和疑问句有两种

You usedn’t to make that mistake.

She didn't use(d) to do it, did she?

You used to smoke a pipe, didn't you? / use(d) n't you?

【区别】

(2) be / get / become used to + n. / doing 习惯于

I have always been used to hard