兩個英語問題

看看這個Cambridge Dictionary Online字典解釋吧。clean 是及物動詞。但clean up sth 是壹個固定搭配。意思是“把...打掃幹凈，把...整理好”. 固定搭配是不能拆開的。所以必須加上up.

clean up something?

(MAKE NEAT)

Definition

to remove dirt from something or make something neat:

We need to do something to clean up this mess and then get out of there.

I have to clean things up before the guests arrive.

第二個問題：不可以，因為to do sth 是表示“為了...目的”，盡管for doing sth 從語法上講也是這個意思，但是在英文表達裏通常是for sth, 而不是for doing sth. 即：動詞用to do sth, 名詞用for sth