why did your sister (cry)用不用加ing为什么

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/09 07:57:22
why did your sister (cry)用不用加ing为什么

why did your sister (cry)用不用加ing为什么
why did your sister (cry)用不用加ing
为什么

why did your sister (cry)用不用加ing为什么
不加..
DID 对疑问句提问了..动词该用原形!

did 后用原形

did 是助动词do 的过去时.后面加原形..

因为用了did,改成were就加ing

不用,是一般过去时.而且有did了,就用原型

过去时
加ing
可以说 why is your sister crying