我已经发了短信给你。

Wǒ yǐjīng fā le duǎnxìn gěi nǐ.

I already sent you a text message.

我刚发电邮给你，你检查一下吧。

Wǒ gāng fā diànyóu gěi nǐ, nǐ jiǎnchá yíxià ba.

I just sent you an email, go have a look.

我昨天晚上给你发消息，你怎么没有回？

Wǒ zuótiān wǎnshang gěi nǐ fā xiāoxi, nǐ zěnme méiyǒu huí?

I sent you a text messgage last night, how come you didn't respond?