下课后我们去喝咖啡，好吗？

Xiàkè hòu wǒmen qù hē kāfēi, hǎo ma?

After class shall we go have some coffee?

以后有问题，你可以随时给我打电话。

Yǐhòu yǒu wèntí, nǐ kěyǐ suíshí gěi wǒ dǎ diànhuà.

If you have any questions in the future, you can call me anytime.

他站在我后面，所以我一开始没看到他。

Tā zhàn zài wǒ hòumian, suǒyǐ wǒ yì kāishǐ méi kàndào tā.

He was standing behind me, so I didn’t see him at first.