你来我家以前，给我发一个短信！

Nǐ lái wǒ jiā yǐqián, gěi wǒ fā yí gè duǎnxìn!

Before you come to my house, send me a message!

我发了短信给他，可是他还没回复我。

Wǒ fā le duǎnxìn gěi tā, kěshì tā hái méi huífù wǒ.

I sent a message to him, but he still hasn't responded.

直接打电话比传短信快。

Zhíjiē dǎ diànhuà bǐ chuán duǎnxìn kuài.

Calling directly is faster than sending a message.