他必须努力学习物理，是吗？

He must work hard at physics, mustn't he?

youdao

他必须努力学习以保持他在同学中的领先地位。

He had to work hard to remain ahead of his classmates.

youdao

他必须努力学习。

He must study hard.

youdao

我想做个作家，所以我现在必须努力学习。我读了许多鲁迅的书。我很喜欢他的风格。

I want to be a writer, so I must study hard now. I have read many of the books by Mr. Lu Xun. I really like his styles.

youdao

我想做个作家，所以我现在必须努力学习。我读了许多鲁迅的书。我很喜欢他的风格。

I want to be a writer, so I must study hard now. I have read many of the books by Mr. Lu Xun. I really like his styles.

youdao