`1.` I bought a new car but i haven't got enough money.

`2.` Because of his sickness, so he was absent from school ( Because of + cụm danh từ )

`3.` Despite crowd, but i really enjoyed the festival ( Despite + cụm danh từ )

`4.` Although we couldn't go swimming, but it started to rain heavily. ( Although: mặc dù, but: nhưng )

$#Chi$

$1$. I don't have enough money but I bought a new car.

$→$ but dùng cho 2 vế đối lập nhau → (không đủ tiền nhưng mua được xe)

$2$. Because of his sick, he was absent from school.

$→$ because of = because (đều chỉ nguyên nhân)

$3$. Despite it was crowded but I really enjoyed the festival.

$→$ Despite đứng trước một danh từ, đại từ (this, that, what…) hoặc V-ing...

$4$. It started to rain heavily, although, we couldn't go swimming.

$→$ although thay thế cho however

$#Study well$