He didn't do his homework yesterday 为什么do是原型。不是疑问句吖--。求解。

Question

如题所述

Answer 1

didn't
的原形是do
not
，
do为助动词，助动词后面都是跟动词原形。
do
homework是做作业的意思。
He
didn't
do
his
homework
yesterday.
他昨天没有做作业。
那把didn't
拆了吧
He
did
not
do
his
homework
yesterday.
do的过去式是did，因为do作为助动词时，后面加动词原形，所以跟在did后面的动词也是用原形。