Identify the complete verb: he still has not mailed the check

Hey there!

A verb is an action word- like run, jump, kick, and more.

It's essentially something that requires an action to do, and that word in this sentence is mailed.

This is because mailed is an action word. It requires an action to do. When you mail something, you make an action, whether you put it in your mailbox or go to the post office, it is an action.

Hope this helps!

3 is blunder, i’m not sure about the last one but the first two look correct