Rules and explanations
For the basics, see pages 2&3
Here is a video that describes singular and plural
Exercises
EASY
Easy 1
Easy 2
Easy 3
Easy 4
Easy 5
Easy 6
Easy 7
Easy 8
Easy 9
MEDIUM
Medium 1
Medium 2
Medium 3
Medium 4
Medium 5
Medium 6
Medium 7
Medium 8
CHALLENGING
Challenging 1
Challenging 2
Challenging 3
Challenging 4
