when开头的一般疑问句两个

1.When are you leaving?你什么时候走？

2.When were you born?你什么时候出生？

3.When did he arrive?他什么时候到？

3.When will you come to see me?你什么时候要来看我?

4.When are they going to visit the Great Wall?他们打算什么时候去游览长城?

5.When he comes is not known.他何时来还不知道.