单元语法聚焦 ( 四 )构成used to +动词原形eg : He used to play basketball after school
他过去常常放学后打篮球
意义表示过去的习惯动作或状态,现在已不再发生或不存在
其中 to为不定式符号,后接动词原形
eg : He used to be a very poor man
他过去是一个很穷的人
( 暗指现在已经不穷了 )used to 的用法各种结构形式否定句used not to ,usedn't to 或didn't use toeg : She didn't use to have long hair
= She usedn't to have long hair
她以前不留长发
一般疑问句Did sb
use to
Used sb
eg : Did you use to play the piano
= Used you to play the piano
你过去经常弹钢琴吗
反意疑问句附加疑问部分可用didn't 或 usedn'teg : He used to drink , usedn't he
他过去常常喝酒,对吗
He didn't use to drink , did he
他过去不经常喝酒,对吗
易混的结构be/get/become used to doing sth
意为“习惯于做某事”eg : My grandfather is used to going for a walk after dinner
我爷爷习惯于晚饭后去散步
be used to do sth
意为“被用于做某事”eg : Wood can be used to make paper
木头能用来造纸