Half of the apples (is )bad .(Are )there any people in the room last night?

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Half of the apples (is )bad .(Are )there any people in the room last night?
Half of the apples (is )bad .
(Are )there any people in the room last night?

Half of the apples (is )bad .(Are )there any people in the room last night?
第一个之所以用is是因为他将hafl of apples看成了一个整体!强调整体性!
第二个用are是因为后面的people肯定是指很多人~当然就用are了
people的单数和复数形式同形!