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助動詞(do, does )的用法 只有實意動詞作謂語時才涉及使用助動詞。以like為例: 當(dāng)句子為肯定句時不涉及使用助動詞,只涉及“主謂一致”原則。 eg : I like English a lot. Michael likes Chinese food very much. 當(dāng)句子為否定句時,要根據(jù)主語的人稱來決定使用相應(yīng)的助動詞:當(dāng)主語為“三單”時,要使用does。當(dāng)主語為“非三單”時,用助動詞原形do。例如把下列句子變否定句: eg : Kangkang likes doesn’t like math. They like don’t like sports. 當(dāng)句子變疑問句時,: eg : Michael likes Chinese Michael like Chinese food? Yes, he does./ No, he doesn’t. Jane and Helen like Jand and Helen like music? Yes, they do./ No, they don’t. There be句型 (1)There be句型主要用以表達(dá)“某處(某時)有某人(某物)。”其基本結(jié)構(gòu)為“There be+某物(某人)+某地(某時)”其中there是引導(dǎo)詞,沒有詞義。主語是be后面的名詞, be是謂語動詞,在一般現(xiàn)在時中be只用is和are兩種形式。下面這首歌訣可幫你巧記there be句型結(jié)構(gòu): There be放句首,主語跟在后。地、時放句末,強(qiáng)調(diào)置前頭。There is a book on the desk. 有時為了強(qiáng)調(diào)地點(diǎn),也可把介詞短語放在句首。如:On the desk there is a book. (2)There be句型中的be動詞