Because of being poor, he can't buy that house.
⇒ Because he is poor, he can't buy that house. ( Because + S + V, S + V )
He studied hard, but he didn't pass the exam
⇒ Although he studied hard, he didn't pass the exam. ( Although + S + V, S + V )
Chúc bạn học tốt ;3
# Yumi