English Grammar with Answers app for iPhone and iPad

Students who want help with English grammar. It is written for you to use without a teacher.

Will be useful for you if you are not sure of the answers to questions like these:
- What is the difference between I did and I have done?
- When do we use will for the future?
- What is the structure after I wish?
- When do we say used to do and when do we say used to doing?
- When do we use the?
- What is the difference between like and as?

These and many other points of English grammar are explained and there are exercises on each point.