是when did it started还是when did it start?
问题描述:
是when did it started还是when did it start?
答
用了did 后面加动词原形
答
后者when did it start是正确的,因为前有助动词did,动词用原形。
答
when did it start
答
A
答
是when did it start?
因为前面的助动词已经由do变为了did,所以后面的动词使用原形就好了