一个错别字毁不了一封邮件，但小错误一多，就会显得你匆忙或粗心。下面是最常出现的几类错误，以及改正方法。
1. Your / you're #
Your welcome → You're welcome. 用 you are 代入测试一下就知道了。阅读详细讲解。
2. Its / it's #
The team shared it's results → The team shared its results. It's 永远表示 it is 或 it has。阅读详细讲解。
3. Their / there / they're #
There reviewing it now → They're reviewing it now. 阅读详细讲解。
4. Affect / effect #
This won't effect the deadline → This won't affect the deadline. 阅读详细讲解。
5. Then / than #
Sooner then expected → Sooner than expected. 阅读详细讲解。
6. 逗号拼接（comma splice） #
Thanks for your reply, I'll check tomorrow. → Thanks for your reply. I'll check tomorrow. 阅读详细讲解。
7. 问候语或称呼后面漏了逗号 #
Hi John I hope you're well. → Hi John, I hope you're well.
8. Me、myself 和 I #
Please send it to John and myself. → Please send it to John and me. 去掉另一个人再测试：应该说 send it to me，而不是 send it to myself。
9. 主谓一致 #
The list of changes are attached. → The list of changes is attached. 主语是 list（单数），而不是 changes。
10. 把 “could have” 写成 “could of” #
We could of shipped earlier. → We could have shipped earlier. should have 和 would have 也是同理。
一个 10 秒钟的好习惯 #
发送重要邮件之前，先把它粘贴到 iPhone 上的 AI Grammar Checker。只需一键，上面这些错误就能全部找出来，改好的版本还可以直接复制回 Mail。