指代不清
在使用代词如
it, he, she, this, that, which, one
等的时候，前面的句子中应该出现明确的先行
词。如果指代不清，就会造成意思上的混乱。
巩固练习：改正句子。
1. The world's energy demand still continues to rise. How will that ever be possible for us to get
through?
2. Peter told Alan that his wife was unhappy.
3. Marsha attributed her success to her husband's support, which was generous.
4. Susan's mother wondered if she was tall enough to be a model.
解析：
1. The world's energy demand still continues to rise. How will the situation ever be possible for us
to get through?
2. Peter told Alan, "Your wife is unhappy."
3. Marsha attributed her success to her husband's generous support.
4. Susan's mother wondered if Susan was tall enough to be a model.

动词时态、语态的误用，前后不一致。例如：
I was walking along the road, and there are not so many cars on the street. (误)
I was walking along the road and there were not so many vehicles on the street. (正)
这个例句中前面是was walking ，所以后面也要用相应的过去进行时were，同一个句子里，没有特殊情况，前后时态时要保持一致的。

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