WAS和WERE有什么区别?
英语were和was有什么区别?
been和was were有什么区别
was 和 were有什么区别?
用did提问和用was/were提问有什么区别?
一般过去式用来表示am is are的was和were有什么区别?
were和was的区别
was/were been doing 和was/were being done 区别是什么?分别表示什么?
had和was,were的区别是设么?
i was 和 i were 的区别
done 和 was/were done 区别
which are conected 和which were connected有什么区别?
had been invited 和were invited有什么区别?