@ehBeth,
Aware that trying to write in English is such a great way to improve English skills, a couple of my friends and I have decided to write in English once a week, about anything we like.
We are not attending school or anything like that, and no one forces us to do it. So I doubt whether any of it could be called 'assignment'.
Only, as we all share what each of us writes when the writing is done,
I get to see a lot of seemingly unnatural or funny expressions.
And then I post those unnatural phrases here, waiting for your answer.
This time, a friend of mine said,
'Make sure it's not something you can't do'
and I wanted to know if this sentence sounds okay to native speakers.
After getting the answer I want, I inform my friends of the mistakes to be corrected, making them believe it is me who did all.
Truth be told, I take all the credit you deserve. lol.