be used by ,be used for,be used to 有什么区别?

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be used by ,be used for,be used to 有什么区别?
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be used by ,be used for,be used to 有什么区别?
be used by ,be used for,be used to 有什么区别?

be used by ,be used for,be used to 有什么区别?
be used by的意思是“由(被)……使用.”\x0d“used to加不定式”表示过去常常干某事,现在不在干了.\x0d例如:I used to go to work by bus.Now I take a taxi.\x0dShe used to be very shy.\x0d“be used to doing”表示习惯于干某事\x0d▲ be used for意为“(某物)被用做……”其后接名词、代词或动名词.如:\x0d(1)This kind of bamboo can be used for water pipes .这种竹子可用作水管.\x0d(2)A knife can be used for cutting bread .刀可用来切面包.\x0dbe used to do sth.也可表示“(某物)被用做……”,但其后接动词原形.如:\x0d(3)A hammer is used to drive nails .锤子是用来敲钉子的.\x0d提示:be used as相当于be used for的用法.如:\x0d(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.