面对英语四级考试,很多考生都非常的迷茫,不知道有哪些知识点和核心考点。今天我们为大家整理了2022下半年大学英语四级语法知识:祈使句结构,供各位考生参考。
2022下半年大学英语四级语法知识:祈使句结构
13.1 祈使句结构
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)。
Take this seat.
Do be careful.
否定结构:
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?
否定结构:
Let's not talk of that matter.
Let us not talk of that matter.