A single typo won't ruin an email, but a pattern of small mistakes can make you look rushed or careless. Here are the errors that show up most often, and how to fix them.
1. Your / you're #
Your welcome → You're welcome. Test it with you are. Read the guide.
2. Its / it's #
The team shared it's results → The team shared its results. It's always means it is or it has. Read the guide.
3. Their / there / they're #
There reviewing it now → They're reviewing it now. Read the guide.
4. Affect / effect #
This won't effect the deadline → This won't affect the deadline. Read the guide.
5. Then / than #
Sooner then expected → Sooner than expected. Read the guide.
6. Comma splices #
Thanks for your reply, I'll check tomorrow. → Thanks for your reply. I'll check tomorrow. Read the guide.
7. Missing comma after a greeting or name #
Hi John I hope you're well. → Hi John, I hope you're well.
8. Me, myself, and I #
Please send it to John and myself. → Please send it to John and me. Drop the other person and test it: send it to me, not send it to myself.
9. Subject–verb agreement #
The list of changes are attached. → The list of changes is attached. The subject is list (singular), not changes.
10. "Could of" instead of "could have" #
We could of shipped earlier. → We could have shipped earlier. The same goes for should have and would have.
A 10-second habit that helps #
Before you send an important email, paste it into AI Grammar Checker on your iPhone. It catches all of the mistakes above in one tap, and you can copy the corrected version straight back into Mail.