A MISTAKE DETECTOR Find grammar mistakes:

1.These books are my. They are not theirs. 2. She is not my friend. She is her.
3. This is not her bag. It's mine bag.
4. It isn't my book. It's your.
5. Look at the flag! It's our.
6.This book is him.

These books are mine. They aren't theirs.She's not my friend. She's hers.This is not hers bag. It's mine bag.It isn't my book. It's yours.Look at the flag! It's ours.This book is his.