used to do sth.

Used to encourage sb to do sth he is hesitating to do

用以在某人迟疑时鼓励他去做某事

( also come along) used in the imperative to encourage sb to do sth,( esp to hurry, try harder or make an effort)

用于祈使句以鼓励某人做某事，（尤指促其加速、努力或试一试）

In Modern Chinese, "bu yao tai X" is a common structure. It means "persuade, caution" in Imperative Sentence. It is used to persuade sb. not to do sth. or not exceed the limit.

在现代汉语中，不要太X是一个较为常用的格式，一般用来表示告诫劝阻的语义，多用在祈使句中，来规劝某人做事不要过分或者超过某个限度。

we always mix it up with be used doing sht or be used to do sth.

我们老是会将它与习惯做某事、被用来做某事这两个短语混淆

describing a repeated act or habit of the past, which is no longer true now: used to do sth.

描述过去重复的现在不再有的动作或习惯

be used to do sth. = be used for doing sth.

被用来做某事