Daivid was surprised at the bird's change, and he was just to ask what had made such a surpring为什么要用"to ask"

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Daivid was surprised at the bird's change, and he was just to ask what had made such a surpring为什么要用

Daivid was surprised at the bird's change, and he was just to ask what had made such a surpring为什么要用"to ask"
Daivid was surprised at the bird's change, and he was just to ask what had made such a surpring
为什么要用"to ask"

Daivid was surprised at the bird's change, and he was just to ask what had made such a surpring为什么要用"to ask"
有两个动词啊,何况be to do 表示将要做某事.

The enemy gave in finally .最终敌人屈服了。但如果说向某人屈服,则用介词to来连接。因为give in 是 vi,不及物动词,不能直接加宾语。所以这里用give

be to 结构,后接动词原形,表示将要发生的动作,“大卫对小鸟的变化的感到吃惊,他准备问问是什么造成了这种惊人的变化”。

be to do表将来 在这里就是“他就要去弄清楚、、、”的意思