与不定词连用，表示义务获预期发生某事。

With the infinitive to express obligation or what is expected to happen.

youdao

本书带你一步一步慢慢深入探讨不定词的用法。

This book leads you step by step to learn how and when to use the infinitive.

youdao

本书带你一步一步慢慢深入探讨不定词的用法。

This book leads you step by step to learn how and when to use the infinitive.

youdao