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. 【查看更多】
