[國中] 此句用不定詞如何解釋?

[ketoto (我忘了如何回水球啦)]

句子: He got 2 millions of votes cast __________ Britain's Got Talent.

選項 1. win 2.won 3.to win 4.winning

憑感覺很自然就想選3 但請問要怎麼解釋用3而4不行嗎

Thanks a lot!

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→ zofloya:before winning, you have to get votes first,that's why