倒装句什么时候用do和does

答:部分倒装句对谓语倒装时需要使用助动词do(第三人称does）和did，一般现在时的倒装句举列如下:

用助动词do:

little do I know he is a great writer.

only by working hard do you make your mark.

Rarely do they come to school late.

第三人称单数用does

so sleepy does he go to sleep.

never does the boy tell lies.