用原形,因为would是情态动词,情态动词后用原形。
例句：
It would be better to decide it on the toss of a coin.
最好用抛硬币的方式来对此事做决定。
He would have done better to play a spade now.
他要是现在出一张黑桃牌就更好了。
Perhaps it would be better if you came back tomorrow.
如果你明天回来，也许更好。
I would work better if I had some peace and quiet.
四周若再安静一些，我会干得更好。
We felt we might finish third. Any better would be a bonus.
我们觉得我们可能得第三名。任何更好的结果都是意外收获。
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