全国大众英语测验语法——祈使句构造
祈使句用以表达饬令，要求，恳求，奉劝等。
1）祈使句有两品种型，一种因此动词底细开头，在动词底细之前加do (但只限于省略第二人称主语的句子)。
Take this seat.
Do be careful.
否定构造：
Don't move.
Don't be late.
2）第二种祈使句以let开头。
Let的反意疑问句
a. Let's包括说话者
Let's have another try，shall we / shan't we?
= Shall we have another try?
b.Let us不包括说话者
Let us have another try，will you / won't you?
= Will you please let us have another try?
否定构造：
Let's not talk of that matter.
Let us not talk of that matter.

关键字：英语四级测验语法 英语三级测验语法 英语祈使句 英语中的祈使句 英语祈使句的用法