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新一轮中考复习备考周期正式开始， 一般过去时三种变化技巧 一变：肯定句变为否定句 【技巧1】当句中含有情态动词或助动词could，would，should等时，可直接在其后面加not构成否定句。例如： I could get you a concert ticket. → I could not / couldn't get you a concert ticket. 【技巧2】当句中含有系动词was，were 时，可直接在其后加not构成否定句。例如： I was on the Internet when you called me. → I was not / wasn't on the Internet when you called me. 【技巧3】当句中谓语是除情态动词、助动词、系动词was,were以外的动词时，在该动词之前加did not / didn't，动词还原，构成否定句。例如： The famous singer sang some Chinese songs. → The famous singer did not / didn't sing any Chinese songs. 二变：陈述句变为一般疑问句 【技巧1】移动词语的位置。将was，were,could，would，should等移到句首。例如： He could pack his things himself. → Could he pack his things himself? 【技巧2】添加助动词did。谓语是除情态动词、助动词、系动词was,were以外的动词时，在主语之前加did，动词还原。例如： Mr Li looked very old. → Did Mr Li look very old? 三变：陈述句变为特殊疑问句 【技巧1】确定疑问词：人who / whom，物what，地点where，时间when / what time，原因why，频率how often，长度how long，距离how far等等。例如： They gave the concert last night. → When did they give the concert? 【技巧2】辨认结构形式：疑问词+情态动词/助动词/ was / were / did +主语+...? 例如： The accident happened near the station. → Where did the accident happen. (责任编辑：admin) |