Analysis of test questions: There are three steps in modifying ill sentences: ① Reading sentences and sorting out meanings; (2) check the sentences and find the reasons (it is very important to find the reasons); (3) change the sentence and keep the original intention (change less and change skillfully). Several types of ill sentences: 1. Incomplete components: that is, the sentence lacks some necessary components and fails to express the meaning of the sentence clearly. 2. Improper collocation: that is, one or two components or two words in a sentence are improperly collocated. 3. The word order is reversed: that is, the words in the sentence are not arranged according to the law and the need to express meaning. 4. meaning repetition: that is, there are redundant elements in the sentence, which makes the sentence verbose and cumbersome. 5. The concept is unclear: that is, the meaning in the sentence is vague and confusing. 6. Inconsistency: that is, the meaning of the sentence is inconsistent. 7. Improper classification: that is, in a sentence, things that are not in the same category are classified into one category.