我上星期联系过他了，他还在北京。

Wǒ shàng xīngqī liánxìguò tā le, tā hái zài Běijīng.

I contacted him last week, he is still in Beijing.

有问题可以随时联系我。

Yǒu wèntí kěyǐ suíshí liánxì wǒ.

If you have any questions, you can contact me anytime.

你还有跟她联系吗？

Nǐ hái yǒu gēn tā liánxì ma?

Are you still in contact with her?