初中英语语法大全：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：Dont move.Dont be late.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Lets have another try，shall we / shant we= Shall we have another tryb. Let us 不包括说话者Let us have another try，will you / wont you= Will you please let us have another try否定结构：Lets not talk of that matter.Let us not talk of that matter.
