精选优质文档-倾情为你奉上祈使句的用法及练习1、 含义用来表示请求、命令、劝说、叮嘱等的句子就是祈使句。祈使句一般以动词原形开头。2、 形态(1) Be型(be+adj)Be careful!Be dangerous!Be quiet!(2) Do型(Do代表动词原形)Open the door!Close the window!Go and play football!(3) Lets或Let us型Lets go home!Let us help Mary!Let me clean the room!(4) No+动名词,多用在标语禁令中No smoking!No parking!No spitting!No+动名词可以与Dont+动词原形替换。No smoking!=Dont smoke!3、 否定形式Be型和Do型前直接加Dont,Lets型可前面直接加Dont或lets后加not。Dont be careful!Dont op