There you have! Some crosswords and online exercises to review present simple:
Ending -s in the Simple Present – Crossword 1
Ending -s in the Simple Present – Crossword 2
Present simple – 3rd person -s – Exercise 1
Present simple– 3rd person -s – Exercise 2
Negations in the Simple Present – Exercise 1
Negations in the Simple Present, don’t or doesn’t – Exercise 2
The forms of be (am, are, is) in English – Exercise 1
The forms of be (am, are, is) – Exercise 2
The verb be (am, are, is) in a text.
Sentences with am, are and is – Exercise
Teacher Nando's Classroom 
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