Question

Mary can speak English.(改成一般疑问句，并作否定回答)

Come and join_____.
A.we B.our C.us D.ours

Answer 1

Can Mary speak English? No, she can't.　含有情态动词（如can, must , should等）的句子变成一般疑问句都是直接把情态动词提前。否定体现在情态动词上。这一点与be动词一样，如
Mary is a Chinese girl. 一般疑问句为Is Mary a Chinese girl? No, she isn't.
下面一题应该是C。在动词和介词后要用宾格形式。us是“我们”的宾格形式。

Answer 2

Can Mary speak English? No, she can't.

下面题目选C,根据词性判断,A,B,D词性均不合题意.望采纳!

Answer 3

Can Mary speak English?
No, she can't.

下面那个C，宾格嘛

Answer 4

Can Mary speak English?
No,she can't.选us

Answer 5

Can Mary speak English?
No,she can't.