He was very tired, so he went to bed immediately. -> Because of

$-$ Because of being tired, he went to bed immediately.

Giải thích: 

- Because of + N/Ving, S + V (+O): Bởi vì..., nên...

- immediately (adv) ngay lập tức.

`->` Because of his tiredness, he went to bed immediately.

`-` Cấu trúc : Because of DANH TỪ? CỤM DANH TỪ,...............

`-` Dịch nghĩa : Vì mệt nên anh đi ngủ ngay.