祈使句用以表达命令,要求,请求,劝告等。
1)祈使句有两种类型,一种是以动词原形开头,在动词原形之前加do (但只限于省略第二人称主语的句子)。例如:
Take this seat. 坐这儿。
Do be careful. 务必小心。
否定结构:例如:
Dont move. 不准动。
Dont be late. 不要迟到。
2)第二种祈使句以let开头。
Let 的反意疑问句:
a. Lets 包括说话者。例如:
Lets have another try, shall we / shant we? = Shall we have another try? 我们再试一次,如何?
b. Let us 不包括说话者。例如:
Let us have another try,will you / wont you? = Will you please let us have another try? 你让我们再试一次,好吗?
否定结构:例如:
Lets not talk of that matter. 不要谈这件事。
Let us not talk of that matter. 你不要让我们谈这件事。
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