See also Online Exercises below.
Mixed forms - positive, negative and questions:
More PDF worksheets:
Present simple exercises PDF positive, negative and question forms
Present continuous exercises PDF positive, negative and question forms
Mixed exercises PDF compare the present tenses with other English tenses
Present simple Online exercises and grammar rules.
Present continuous Online exercises and grammar rules.
Present simple + continuous Compare these two forms.
PDF grammar rules
English tenses PDF grammar rules + exercises
For beginners and elementary students of English as a second language.