Grammar Fix shows a sentence with a missing word. Choose the option that makes it correct. Every answer explains the rule in simple words, so common mistakes stop repeating.
It's always means it is or it has. Its shows ownership: the cat licked its paw.
Since + a start point (since Monday). For + a length of time (for two days).
Choose by sound, not letter: an hour, a university.
What grammar topics are covered?
Is it suitable for beginners?
Can I see my mistakes?