Infinitival
a. 不定式的
🗣️ 情景例句
Yes. I wonder if you can send up some of boiling water for me.
是的，你可以送点开水上来吗？
Do you think you'll be able to go to sleep right away?
你认为你将马上入睡吗？
That's a good idea! Why not? Let's go.
好主意！为什么不呢？我们走吧。