done/note it/understood

* done

we are going to do something but I wasn't done

agree that task or assignment

we'll be done

比如主管叫你下星期提醒他一件事，回 done 代表非常願意去做，但這時還沒做（應該是還不能做）

less formal

more formal - consider it done

* note it

aware of a task

received the information

被問幫忙在六點前完成，回答 note it (more professional)

* understood

對比 understand, understood is less formal. more friendly