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

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Beusedtodoingsth,usedtodosth,beusedtodosth有什么区别Beusedtodoingsth,usedtodosth,beusedtodosth有什么区别Beused

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

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