初一英語(yǔ)上冊(cè)知識(shí)點(diǎn)總結(jié)：助動(dòng)詞的用法

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    助動(dòng)詞（do, does ）的用法
    只有實(shí)意動(dòng)詞作謂語(yǔ)時(shí)才涉及使用助動(dòng)詞。以like為例：
    1）當(dāng)句子為肯定句時(shí)不涉及使用助動(dòng)詞，只涉及"主謂一致"原則。
    eg : I like English a lot.
    Michael likes Chinese food very much.
    2）當(dāng)句子為否定句時(shí)，要根據(jù)主語(yǔ)的人稱來(lái)決定使用相應(yīng)的助動(dòng)詞：當(dāng)主語(yǔ)為"三單"時(shí)，要使用does;當(dāng)主語(yǔ)為"非三單"時(shí)，用助動(dòng)詞原形do。例如把下列句子變否定句：
    Kangkang likes math.----Kangkang doesn't like math.
    They like sports.------They don't like sports.
    3）當(dāng)句子變疑問(wèn)句時(shí)，同樣要根據(jù)句子的主語(yǔ)來(lái)決定在句首使用Do或Does.例如下列句子變問(wèn)句：
    Michael likes Chinese Food.----Does Michael like Chinese food? Yes, he does./ No, he doesn't.
    Jane and Helen like music.----Do Jand and Helen like music? Yes, they do./ No, they don't.