そう言えば

そう言えばそうだ。

Now that you say it, I think you're right.

そう言えば買い物もしたいな。

Come to that, I'd like to do some shopping too.

そう言えば小さすぎるわよ、その指輪。

Now that I think of it, it's too small - that ring.

そういえば、確かに太郎を見かけました。

Come to think of it, I did see Taro.

そういえば。やばい、秀樹に毒されてるわ。

Now that you mention it. Yeek, Hideki's habits are rubbing off on me!