你收到我昨天发的邮件了吗？

Nǐ shōudào wǒ zuótiān fā de yóujiàn le ma?

Did you receive the email I sent yesterday?

请先看一下附件，再回复我的邮件。

Qǐng xiān kàn yíxià fùjiàn, zài huífù wǒde yóujiàn.

Please first look at the attachment, then reply to my email.

你怎麽这么晚才给我发邮件？

Nǐ zěnme zhème wǎn cái gěi wǒ fā yóujiàn?

Why did you wait until so late to email me?