用be used to do sth.造句

这个句型只有一个意思,就是表示被用来做某事,如the meat is used to feed the tigers。另外,有be used to doing和used to do两种结构,前者表示习惯做某事,后者表示过去经常做某事,如I'm used to walking home after school。he used to go swimming,but now he doesn't。