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小學(xué)四年級英語語法:祈使句結(jié)構(gòu)

時間:2012-11-20 18:05:00   來源:無憂考網(wǎng)     [字體: ]
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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.