用does还是do？

Question

That we go swimming every day do us a lot of good.
That we go swimming every day does us a lot of good.
这段主语从句中要用do还是does呢，我认为要用do因为主语时we不是用第一人称复数吗？但是答案上时用does，求大神解惑。

Answer 1

用does。虽然we是复数人称，但是that we go swimming every day 这是一件事情，单数，所以用does。

Answer 2

今天分享的是一般现在时Do/does。