He is reading a book.

他正在读一本书。

Evry time I see him, he is reading a book.

每一个我见到他的时候，他都在看书。

He is reading a book by a famous Nigerian author.

他正在读一本著名尼日利亚的作家的书。

He is reading a book on sociology for his class.

他在为他的课程阅读一本关于社会学的书。

He is reading a book on cardiology to better understand heart diseases.

他正在读一本关于心脏病学的书，以更好地了解心脏病。

He is reading a book quietly.

他正在安静地读书。

He is reading a book named Three doors.

他在读一本叫作《三重门》的书。

He is reading a book named Three doors .

他在读一本叫作《三重门》的书。

In the dead sea, floating on his back, he is reading a book with a parasol open.

他仰卧在死海上，撑着一把阳伞，还在看书呢。