- add something on (to something): to include or attach something extra: bao gồm hoặc gắn thêm cái gì đó
Ex: A service charge of 15% was added on to the bill.
- add to something: to increase something in size, number, amount, etc: làm tăng về số lượng hoặc kích cỡ
Ex: - The bad weather only added to our difficulties.