致读者
1 句子The sentence
2 名词Nouns
3 冠词Articles
4 代词Pronouns
5 数量Quantity
6 形容词Adjectives
7 副词Adverbs
8 介词、副词小品词和短语动词Prepositions，adverb particles and phrasal verbs
9 动词、动词时态、祈使语气Verbs，verb tenses，imperatives
10 动词Be，Have，Do
11 情态助动词和有关动词Modal，auxiliaries and related verbs
12 被动语态和使役式The passive and the causative
13 疑问句、答语、否定句Questions，answers，negatives
14 条件句Conditional sentences
15 直接引语和间接引语Direct and indirect speech
16 不定式和“-ing”形式The infinitive and the ‘-ing’ form
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