(06/10/21)

-그녀는 언제나 수업에 늦게 들어간다.

 She always goes to the class late. -> She always enters the class late.

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

-쓰레기가 바다에 떠다닌다.

 Trashes are floating in the ocean. -> Garbage is floating in the ocean.

=> Corrected : The sentence is corrected grammatically. 

-너만 빼고 모두가 참여했어.

 Everyone was intended except you. -> Everyone joined except you.

=> Corrected vocabulary.

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