1. 和你谈话很愉快。

[ hé nǐ tán huà hěn yú kuài 。 ]

Talking with you is a pleasure.

2. 我已经和他谈过几次了。

[ wǒ yǐ jīng hé tā tán guò jǐ cì le 。 ]

I have had several conversations with him.

3. 当老板进来的时候；他们停止了交谈。

[ dāng lǎo bǎn jìn lái de shí hòu ； tā mén tíng zhǐ le jiāo tán 。 ]

They stopped talking when their boss came in.

4. 谈到政策，我得说几句。

[ tán dào zhèng cè ， wǒ dé shuō jǐ jù 。 ]

As far as policy is concerned, I have to say something.