Here you have some exercises to revise for your upcoming exam.

Infinitive or gerund?
Gerunds and Infinitives I
Gerunds and Infinitives II
Zero & 1st conditional
1st & 2nd conditionals
Conditionals I
Conditionals II
Modal verbs I
Modal verbs II
Modal verbs - rephrasing
Verb tenses I
Verb tenses II
Verb tenses III
Making questions