I had a pretty good idea what she was going to do。这句话对么?是不是同位语从句?
其次改成I had a pretty good idea that she was going to do what。这样行么?
I had a pretty good idea about what she was going to do?这又是什么句子?
第二个问题就更错了,what 疑问词又是连接词不能放在后面。
第三句话正确。what she was going to do 是介词 about 的宾语从句。而about ... 介词短语作定语,修饰 idea。
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