把下列句子变成一般疑问句和特殊疑问句

can mary speak three languages？
how many languages can mary speak ？

do The students go to school every day ？
when do the students go to every day ？

do We have an English three times a week？
how often do we have an English ？应该在english 后面加个 class 或者lesson吧。

1.Mary can speak three languages
Can Mary speak three languages?
How many languages can Mary speak?

2.The students go to school every day
Do the students go to school every day?
How often do the students go to school.

3.We have an English three times a week?
Do we have an English three times a week?
How often do we(或者you) have an English ?

你是不是打漏了一个单词，我觉得第三句应该在English后面有个class或者别的词吧？