PRESENT SIMPLE: VERB TO BE

The verb to be is the most important verb in the English language. It is difficult to use because it is an irregular verb in almost all of its forms. In the simple present tense, to be is conjugated as follows:

I present the website where you find exercises on the present simple and you can put into practice the information.

http://www.myenglishpages.com/site_php_files/grammar-exercise-be-present.php