请听老师的话。

Qǐng tīng lǎoshī de huà.

Please listen to the teacher.

有问题的话，可以随时给我发邮件。

Yǒu wèntí de huà, kěyǐ suíshí gěi wǒ fā yóujiàn.

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

他说话很慢。

Tā shuōhuà hěn màn.

He speaks very slowly.