这几个初中英语句子正确吗？

where to go? 不对，应改为：Where shall we go?
May I take john and his girlfriend? 对。
What to buy ? 不对，应改为：What shall we buy?
what fruit do you like? 对，也可以说 What kind of fruit do you like?
when to go? 不对，应改为：When shall we go?
where are we go? 不对，应改为：Where are we going?
when are we go? 不对，应改为： When are we going?

where are we go? when are we go?是不对的这其中有了两个谓语动词,
可以将go 改为going
what fruit do you like?这句话并没有错，但也可以加kind of
where to go? 而这类的句子偏于口语，不是很符合英语语法不过平时口头上可以使用

第一句太直译喇吧；第二句应该去掉TAKE；第三句也是太直译喇；第四句应该加上KIND OF；弟六句应该是 WHERE DO WE GO TO，下面那句也是

你写的都是口语，不能用语法来衡量

1和3应该可以用~

where to go ?what to buy?when to go?都是疑问词+不定式的结构正确。
最后两句应换成where/when shall we go?