问题描述:
分辨词性
I happened to be upstairs one evening
I didn’t go downstairs
I haven’t been able to be outdoors
这三句话中的upstairs ,downstairs和outdoors 分别是什么词性
I happened to be upstairs one evening
I didn’t go downstairs
I haven’t been able to be outdoors
这三句话中的upstairs ,downstairs和outdoors 分别是什么词性
问题解答:
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