“我当时必须来找你。”他解释道。

'I had to see you,' he said, by way of explanation.

《牛津词典》

我到处找你，有件事我必须告诉你，我们找个安静点的地方好吗？

Got something I must tell you. Can't we go some place.

youdao

我将差遣一位使者去找你，明天你必须回到这里来。

I will send a messenger and you must come back tomorrow.

youdao