be used for 和 be used by 有什么用法上的区别?
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be used for 和 be used by 有什么用法上的区别?
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“used to加不定式”表示过去常常干某事,现在不在干了.
例如:I used to go to work by bus.Now I take a taxi.
She used to be very shy.
“be used to doing”表示习惯于干某事
▲ be used for意为“(某物)被用做……”其后接名词、代词或动名词.如:
(1)This kind of bamboo can be used for water pipes .这种竹子可用作水管.
(2)A knife can be used for cutting bread .刀可用来切面包.
be used to do sth.也可表示“(某物)被用做……”,但其后接动词原形.如:
(3)A hammer is used to drive nails .锤子是用来敲钉子的.
提示:be used as相当于be used for的用法.如:
(4)The girl is being used as a servant in the house .这个女孩在家里被当做佣人使唤着.
“used to加不定式”表示过去常常干某事,现在不在干了.
例如:I used to go to work by bus.Now I take a taxi.
She used to be very shy.
“be used to doing”表示习惯于干某事
▲ be used for意为“(某物)被用做……”其后接名词、代词或动名词.如:
(1)This kind of bamboo can be used for water pipes .这种竹子可用作水管.
(2)A knife can be used for cutting bread .刀可用来切面包.
be used to do sth.也可表示“(某物)被用做……”,但其后接动词原形.如:
(3)A hammer is used to drive nails .锤子是用来敲钉子的.
提示:be used as相当于be used for的用法.如:
(4)The girl is being used as a servant in the house .这个女孩在家里被当做佣人使唤着.
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