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. |