After the aircraft flew over, my daughter was wide awake again.

was 是 be 动词的过去式，表示状态或存在。 wide 在这里是副词，意思是"完全地、彻底地"，用来修饰形容词 awake。 awake 是形容词，意思是"醒着的、清醒的"。 wide awake 是一个固定搭配，意思是"完全清醒的、毫无睡意的"。