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so; therefore; accordingly; consequently; on those grounds; that is why; for that reason
like I said; I told you already
雨が降っている。だから傘を持って行こう。
It's raining. Therefore, let's take an umbrella.
だから、無理だって何回も言ったでしょ。
Like I said, I told you many times it's impossible.
明日は試験だから、今夜は勉強します。
There's an exam tomorrow, so I'll study tonight.