They mean (different things) .否定句、一般疑问句、提问

问题描述:

They mean (different things) .否定句、一般疑问句、提问

They don't mean different things .
Do they mean different things?
What do they mean?
无疑后请采纳.
书山有路勤为径,学海无涯苦作舟.
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