你在哪里遇到他呢？

Nǐ zài nǎlǐ yùdào tā ne?

Where did you meet him?

我今天在路上遇到了两个中国人，他们来西雅图已经2年了。

Wǒ jīntiān zài lùshang yùdào le liǎng gè Zhōngguórén, tāmen lái Xīyǎtú yǐjīng liǎng nián le.

Today on the street I ran into two Chinese people; they came to Seattle 2 years ago.

如果你在生活中遇到困难你可以问我。

Rúguǒ nǐ zài shēnghuó zhōng yùdào kùnnan nǐ kěyǐ wèn wǒ.

If you run into difficulties in life, you can ask me.