全國公共英語考試語法—祈使句結(jié)構(gòu)

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    全國公共英語考試語法——祈使句結(jié)構(gòu)
    祈使句用以表達命令,要求,請求,勸告等。
    1) 祈使句有兩種類型,一種是以動詞原形開頭,在動詞原形之前加do (但只限于省略第二人稱主語的句子)。
     Take this seat.
     Do be careful.
    否定結(jié)構(gòu):
    Don't move.
    Don't be late.
    2) 第二種祈使句以let開頭。
    Let 的反意疑問句
    a. Let's 包括說話者 
     Let's have another try,shall we / shan't we?
     = Shall we have another try?
    b. Let us 不包括說話者
     Let us have another try,will you / won't you?
     = Will you please let us have another try?
    否定結(jié)構(gòu):
    Let's not talk of that matter.
    Let us not talk of that matter.