Question

be used to的否定形式是什么？

Answer 1

例句：I used to cut fruit with the knife which is used to cut meat, so now I am used to eating fruit with the flavor of meat.

直译：我过去常常用切肉的刀来切水果，所以现在我习惯于吃带肉味的水果了解析：1.used to do sth.表示“过去常常做某事”变否定句既可以在used的前方加didn't，也可以在used后方加not.

I used to be short, but now I am tall.

我过去很矮，但是现在很高。

He used to be afraid of dark, didn't he? / usedn't he?

他过去很怕黑，不是吗？

be used to do sth.表示“被用来做某事”，这是一个完整的被动语态形式。to do可以用介词for来替换，be used for sth.

Knives are used to cut fruit.

刀用来切水果。

Knives are used for cutting.

刀用来切东西。

be used to doing sth.表示“习惯于做某事”，此处的to是一个介词，介词后一律加动词的ing形式。

I am used to walking along the river after dinner.

我习惯于饭后沿着河边走一走。

PS：常见的to是介词的短语。

be accustomed to doing

devote oneself to doing

look forward to doing

pay attention to doing

prefer doing to doing。