Question

be used to do sth 还是be used to doing sth?

Answer 1

没有be used to do sth这一表述方式，只有used to do sth.和be used to doing sth.
1. used to do sth.的意思是“曾经做过某事”。例如：I used to study in Britain.（我曾在英国学习过。）
2. be used to doing sth.的意思是“习惯于做某事”。例如：I'm used to studying late in the night.“我习惯在深夜学习。”