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1.be used to doing sth.习惯于做某事.He used to reading books in the morning.
2.used to do sth.过去常常做某事,现在不那样的.He used to sing a song in the morning.
3.be used to do sth.被用来做某事,(被动语态).Coal is uesd to made electricity.
常用法就这几个了.同理可以造很多句的,相信你会的.希望对你有用.
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