used to 什么时候做曾经讲,什么时候做常常讲?请举例并说明用法谢谢
1个回答

used to表示过去常常做某事.

例句:I used to play football after school.过去我常常在放学后踢球.

be used to do的意思是被用来做某事;be used to doing的意思是习惯于做某事.

used to 过去常常做某事

be used to 被用来做

used to / be used to (楼上的几位请注意,be used for才是被用来做什么)

used to + do:"过去常常"表示过去习惯性的动作或状态,但如今已不存在.

Mother used not to be so forgetful.

Scarf used to take a walk.(过去常常散步)

be used to + doing:对……已感到习惯,或"习惯于",to是介词,后需加名词或动名词.

He is used to a vegetarian diet.

Scarf is used to taking a walk.(现在习惯于散步)

used to / be used to

used to + do:"过去常常"表示过去习惯性的动作或状态,但如今已不存在.

Mother used not to be so forgetful.

Scarf used to take a walk.(过去常常散步)

be used to + doing:对……已感到习惯,或"习惯于",to是介词,后需加名词或动名词.

He is used to a vegetarian diet.

Scarf is used to taking a walk.(现在习惯于散步)

典型例题

---- Your phone number again?I ___ quite catch it.

---- It's 69568442.

A.didn't B.couldn't C.don't D.can't

答案A.本句虽没有明确的时间状语,但从语意上看 出,在听的时候没有听懂这个动作发生在过去,因此应用过去时.