If that's for me, tell them I'm busy please.

如果那是找我的，请告诉他们我现在正忙着。

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I'm busy with school. It takes up a lot of my time, so.

我的学业很忙。那占据了我大部分时间。

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While I'm busy pointing out ways in which the argument doesn't succeed, I also want to just take a moment and mention that premise two is also subject to criticism.

当我竭力指出,为什么这种论证无法成功时,我也想要花点时间,顺便说说前提二也不能免于批评

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I'm very busy this week.

这周我很忙。

I don't know 实战 - SpeakingMax英语口语达人

I'm not that busy.

我没那么忙。

It sounds like 实战 - SpeakingMax英语口语达人