By the way, could you do me a favor?
顺便说一下，你能帮我个忙吗?
Before I forget(趁我还没忘)
Before I forget, do you have plans for tomorrow night?
哦，趁我没忘，问下你明天晚上有安排了吗?
That reminds me(…让我想起)
That reminds me of my first dog.
哦，那让我想起我养的第一只狗……blahblahblah
Speaking of(说到/提起…)
Speaking of pets，I really miss my first dog
嗯，说到宠物，我实在很想念我养的第一只狗……
While we are on the subject…(既然谈到这个话题)
While we are on the subject of money, may I ask when you will repay the loan?
既然说到钱的话题，我能知道你什么时候会还这笔贷款呢?
