“used to加不定式”表示过去常常干某事，现在不在干了。例如：

　　I used to go to work by bus. Now I take a taxi.

　　She used to be very shy.

　　“be used to doing”表示习惯于干某事。

　　【例如】

　　I am used to getting up early and going to bed early.

　　He is used to being praised by others.