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2. 動詞由 would+動詞原型構(gòu)成。 May I use your bike? 表示可能性。 Can I help you? Could you open the window? 在表示有能力作某事時, could是 can的過去式。 2. 時間狀語: now /Look… /Listen… 3. 由 be動詞+動詞 ing構(gòu)成 4. 動詞變化加 ing 1) clean cleaning 2) 以不發(fā)音 “ e”結(jié)尾的,去掉字母 “ e”,再加 ing make making 3) 重讀閉音節(jié)的單詞,雙寫最后一個字母,再加 ing swim swimming 現(xiàn)在進(jìn)行時 4. 例句 1) The boys are playing now. 2) Look! They are planting trees. 3) Listen! He is singing. 一般將來時 1. 表示將來發(fā)生的動作。 3. 例句 she had borrowed a book before she went to the park. We had learned many new words by the end of last term. 。 3. 做謂語動詞的用法 動詞會有四種形式:單三,現(xiàn)在分詞,過去式,過去分詞 實義動詞 注意:掌握四種形式的變化規(guī)律 1) He works in the office. 2) We are dancing together. 3) I caught a cold last week. 4) She has watered the flower. 實義動詞 4. 做非謂語動詞的用法(指出現(xiàn)在謂語動詞之后的動詞,它受前面謂語動詞的限制) 動詞會有三種形式: 1) 原型 (do) 2) 動名詞 (doing) 3) 不定式 (to do) 實義動詞 1) 用原型: a) let b) make c) help sb.(to)do d) had better do 實義動詞 2) 用動名詞: a) like doing b) enjoy doing c) finish doing d) 介詞之后用動名詞