when you meet him
今日彼に会ったら妻は元気かと聞かれた。
When I saw him today, he asked me how my wife was doing.
彼に会ったらよろしく言ってください。
Please say hello to him when you see him.
彼に会ったらすぐにニュースを知らせるよ。
As soon as I see him, I’ll tell him the news.
万一彼に会ったら、私に電話をするように言ってください。
If you happen to see him, please tell him to call me.
彼に会ったらよろしく言っといてください。
If you see him, say hi for me.