13.1 祈使句結(jié)構(gòu)
祈使句用以表達(dá)命令,要求,請(qǐng)求,勸告等。
1) 祈使句有兩種類型,一種是以動(dòng)詞原形開頭,在動(dòng)詞原形之前加do 。
Take this seat.
Do be careful.
否定結(jié)構(gòu):
Dont move.
Dont be late.
2) 第二種祈使句以let開頭。
Let 的反意疑問(wèn)句
a. Lets 包括說(shuō)話者
Lets have another try,shall we / shant we?
= Shall we have another try?
b. Let us 不包括說(shuō)話者
Let us have another try,will you / wont you?
= Will you please let us have another try?
否定結(jié)構(gòu):
Lets not talk of that matter.
Let us not talk of that matter.