Here you have a funny video which explains some basic grammar points with food as a background:
1. Your vs. You're.
4. Complement vs. Compliment.
6. Compound Subjects.
7. Than vs. Then.
8. Fewer vs. Less.
9. Would've vs Would of*.
Surprisingly, some of these mistakes (such as your/you're, than/then or would've/would of*) are made by native English speakers above all. Non-native speakers focus heavily on grammar while learning English. Conversely, native speakers are usually tricked by their flawless pronunciation, which makes them confused when distinguishing, for instance, between 'than' and 'then' in oral speech.
No copyright infringement intended. For educational, non-commercial purposes.