(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?

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

-넌 샤워를 얼마나 오래하니?

 How long do you take a shower?

=> Corrected : The sentence is corrected grammatically. 

-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.​​