Common grammar mistakes 1.The singular or plural forms of the nouns 名词的单复数问题 2.The tenses of the verbs 动词时态问题 3.Subject-predicate agreement 主谓一致问题 4.Regular collocations 固定搭配问题 5.Proper prepositions and articles 介词和冠词的正确形式问题1. The singular or plural forms of the nouns 2. The tenses of the verbs 3. Subject-predicate agreement 4. Regular collocations 5. Proper prepositions and articles Common grammar mistakes 名词的单复数问题 动词时态问题 主谓一致问题 固定搭配问题 介词和冠词的正确形式问题