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Be used to doing sth,used to do sth ,be used to do sth 有什么区别

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Be used to doing sth,used to do sth ,be used to do sth 有什么区别
e used to sth./doing sth.意为习惯于某事/做某事,to在这里是介词;be used to do sth.意为被用于做某事;used to do 意为过去常常做某事,used to这里是助动词:e.g.
①During the war the castle was used as a prison.战争期间城堡用来作监狱.
②During the war the castle was used for keeping prisoners in.战争期间城堡用来监禁囚犯.
③Im used to the noise.我对这噪音已经习惯了.
④Im not used to getting up early.我不习惯于早起.
⑤Wind can be used to produce electricity·风可以用来发电.
⑥This river used to be clean.这条河以前是干净的. 再答: 希望能帮助到你^O^
再问: 不错,谢谢了!^_^
再答: 不用谢^O^