から
(Kara)
because / since ___.
Connection rules
- +Clause (plain or polite) + から. Usually plain is used when the main clause is also plain, and polite for polite.
- +から is more subjective/assertive than ので.
- +Can appear at the end of a sentence as an explanation: だから ('that's why').
Examples
1.
時間がないから、急ぎます。

Jikan ga nai kara, isogi masu.
Because I don't have time, I'll hurry.
「because / since ___」
2.
雨が降っているから、傘を持って行きます。

Ame ga fu te iru kara, kasa o mo te iki masu.
Since it's raining, I'll take an umbrella.
「because / since ___」
Practice
Because this watch is expensive, I will not buy it.
この時計は___、買いません。
Romaji also accepted