I can’t move fast, but I can move faster than him.

I can’t move fast, but I can move faster than he.

I can’t move fast, but I can move faster than him moves.

I can’t move fast, but I can move faster than he moves.

大家觉得1到4哪个是正确的呢，为什么？
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修改:Mrwhisper FROM 39.149.15.*
FROM 39.149.15.*