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 / couldnt 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 / wasnt 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 / didnt,动词还原,构成否定句。例如:
The famous singer sang some Chinese songs. The famous singer did not / didnt 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
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