辨析be used to do, used to do和be used to doingbe used to do正如前所说,表示“被用来做……,used to do是“过去常做……(现在不做了)”,以此做谓语的句子,其疑问句和否定句有两种变化:既可在主语之前加did,也可把used提到句首变成疑问句;其否定句即可在used后直接加not,也可在主语后加didn’t. be used to doing为“习惯于做某事”,to后面也可用名词也可用代词。例如:①She used to pay visits to Beijing.过去她常去北京访问。②He used to be late for class.过去他常常上课迟到。...