He felt tired from the long journey , so he went to bed early

Cách `1`: Because he felt tired from the long journey, he went to bed early.

Cách `2`: He went to bed early because he felt tired from the long journey.

`-` Because `+` S `+` V, S `+` V ..

`=` S `+` V, because `+` S `+` V..

`-` because : vì (chỉ nguyên nhân, lý do) 

`->` Vì anh ấy cảm thấy mệt mỏi sau chặng đường dài nên anh ấy đã đi ngủ sớm.