(05/04/21)

-주말까지 그 일을 끝낼 수 있어?

 Can you finish that job until the weekend?  -> Can you finish that work by the end of the week?

-넌 샤워를 얼마나 오래하니?

 How long do you take a shower? ​

-너 나이에 비해서 어려 보여.

 You look younger than your age. -> You look young for your age. 

=> Your sentence has a correct grammatical structure, but this has the correct usage/ expression.

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