Japanese - Because. therefore

Today the subject is because/therefor.
[だ]から : so, therefore; since, because
なぜなら[ば] : because　(なぜ meaning 'why')

our examples are:

英：I brought an umbrella because it's raining.
日：雨(あめ)が降(ふ)ってる - から - 傘(かさ)を持(も)って来(き)た
日：it's raining - because/so/therefor - [I] brought an umbrella

英：There's clouds - therefor - seems like rain.
英：seems like rain - because - there's clouds
日：雨(あめ)が降(ふ)りそう - なぜなら - 曇(くも)り

This may seem fairly obvious/natural but to emphasis the "head last" nature of Jp here's a sample question answer:

英：Why did you bring an umbrella?
日：何(なん)で傘(かさ)を持(も)って来(き)たの？
英：Because it's raining.
日：雨(あめ)が降(ふ)ってるから (raining because)

Now go back and read those examples :)