用现在进行时be doing造句五句

The boy is playing football with his best friends.男孩正在和他的好朋友们踢足球。

The teacher is introducing himself.老师正在自我介绍。

I am reading a novel.我正在看小说。

They are climbing a mountain.

他们正在爬山。

Are you all having English class?

你们正在上英语课吗？