请你尽快回复我的邮件。
qǐng nǐ jǐnkuài huífù wǒde yóujiàn 。
Please reply to my email as soon as possible.
他还没有回复我的问题。
tā huán méiyǒu huífù wǒde wèntí 。
He hasn't replied to my question yet.
我们需要在今天之前回复客户。
wǒmen xūyào zài jīntiān zhīqián huífù kèhù 。
We need to reply to the customer before today.