Source: http://www.perfect-english-grammar.com/simple-present-exercises.html

You can do the exercises online or download their PDF versions (with answer key) and do them at home. Ask me questions if you have any.

Simple Present Exercises

Here's a list of all my present simple exercises:

Present Simple Form (with the verb 'be'):

Present Simple Form (with all verbs except 'be'):

Mixed exercises with all verbs (be and other verbs):

Here's an exercise about spelling changes in this tense:

Practice exercises about how we use the present simple:

English 1&2 with Aj Karn