一句话区别开used to do, be used to do和be used to doing

2020-03-29     Stone老师聊英语

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



2.介词with的用法。cut fruit with the knife.表示“用刀切水果”。with介词短语来作方式状语,是“使用”的意思。在with和工具之间要有限定词;

fruit with the flavor of meat 表示“有肉味的水果”。此处的with介词短语来作定语,意思是“带有……的”。介词短语作定语放在被修饰名词的后方。

介词知识在动词后方作状语,在名词后方作定语。

Susan often goes shopping with her mother on weekends.(with作伴随状语)

Susan经常在周末和妈妈一起购物。

The house with a beautiful garden belongs to Mr. Smith.(with作定语)

带有漂亮花园的房子归属Smith先生。



3.定语从句。先行词knife,定语从句中缺少主语,所以要用指代物的关系代词which。还可以用that。关系代词作主语不可以省略,作宾语时可以省略。

The noodles that / which I cooked were delicious.(先行词是noodles, 从句中缺少宾语,所以要用指代物的关系代词,that或which, 还可以省略)

我做的面条很好吃。


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