I. Because & Because of Eg: 1. He is very poor, so she doesn’t love him. Because he is very poor, she doesn’t love him. (2 chủ từ khác nhau => CỤM TỪ) Because of his poverty, she doesn’t love him. 2. He is lazy, so he doesn’t pass the exam. => Because he is lazy, he doesn’t pass the exam. (2 chủ từ giống nhau => Ving)