句型轉(zhuǎn)換

因?yàn)?ldquo;was/were doing”中的was/were是助動(dòng)詞，所以在進(jìn)行句型轉(zhuǎn)換中要注意不需要再另外借助助動(dòng)詞do/did/does，而是直接借用was/were。如：

肯定句：I was trying to work out a solution to the problem at this time yesterday.

否定句：I wasn't trying to work out a solution to the problem at this time yesterday.

一般疑問(wèn)句：Were you trying to work out a solution to the problem at this time yesterday?

特殊疑問(wèn)句：What were you trying to work out at this time yesterday. (劃線(xiàn)部分為a solution to the problem)

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