一般说来,祈使句的否定是在祈使句首加Don’t.如:
Come here.—Don’t come here.不要来这儿.
Have a look.—Don’t Have a look .不要看
当祈使句表示邀请或建议(Let’s…) 时,则在Let’s与 do之间加not.如:
(1) Let’s talk about it.—Let’s not talk about it.我们别谈论它吧.
(2) Let’s go swimming there.—Let’s not go swimming there.我们别去那里游泳吧.
无动词祈使句的否定:在无动词祈使句的句首加not.如:
Here?— Not here.不是这里.
Green?—Not green.不是绿色的.
This one?— Not this one.不是这个.