he is singing里的is是助动词吗?
he is singing里的is是助动词吗?
He is singing.is 做助动词协助主要动词singing 做谓语?
he is always complaining.这里的是is是助动词吗?
Is he singing 的否定回答怎么说?
He is reading.is是助动词还是联系动词?
I heard he is singing.是病句么?
He is good at singing的同义句
英语语法问题例句,He is giving a lecture.这句话中. 我的第一种理解, is 是助动词,givin
He is not good at singing.划singing 划线提问
Tim is singing is the garden的singing画线,是划线部分提问
He is good at singing 改成感叹句
The movie is on at Guangming Cinema的"is"是助动词吗