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1.结构不平行：I was able to raise my TOEFL score by studying hard and I read lots of books.当使用连词将一系列的单词联接起来的时候，应当使用词性相同或同一类型的短语。 2.不知所云：Many companies began using computers mouth. 3.段落过长，不分段主语与动词一致问题：She are a good friend of mine that I has known for a long time.主语和动词在数方面不一致。 4.句子别扭：We heated the soup in the microwave for too long and the shape of the container changed.措辞过长或不清。换言之，句子显得滑稽可笑。