References

You can check the information in these pages:

https://www.englishpage.com/verbpage/simplepresent.html
https://www.englishclub.com/grammar/verb-tenses_present-simple.htm
http://www.learnenglish-online.com/grammar/simplepresent.html
https://cosmoenglish.wordpress.com/2011/06/02/structuressimple-present/
 https://es.slideshare.net/kvaras/2-ppt-simplepresent2019-199598754
https://youtu.be/ABYDdRdW2dc