Diagnostic test - https://elt.oup.com/student/practicegrammar/test?cc=us&selLanguage=en

Diagnostic test on all the verbs - https://www.ego4u.com/en/cram-up/tests/mix-4

Rules

Present Simple - https://learnenglish.britishcouncil.org/en/english-grammar/verbs/present-tense

https://www.ef.com/english-resources/english-grammar/present/

https://www.grammarly.com/blog/simple-present/

Present Simple tests https://www.englishclub.com/grammar/verb-tenses_present-simple_quiz.htm

https://www.ego4u.com/en/cram-up/tests/simple-present-1

https://www.usingenglish.com/quizzes/65.html

Present Conituous - https://learnenglish.britishcouncil.org/en/english-grammar/verbs/present-tense/present-continuous

http://esl.fis.edu/grammar/rules/prescont.htm

Present Continuous tests  https://www.englishclub.com/grammar/verb-tenses_present-continuous_quiz.htm

https://www.ego4u.com/en/cram-up/tests/present-progressive-1

https://www.proprofs.com/quiz-school/story.php?title=present-continuous-tense-quiz

Continuous versus Simple rules https://www.ego4u.com/en/cram-up/grammar/simpre-prepro

Continuous versus Simple tests http://a4esl.org/q/h/vm/sp_or_pc.html

https://www.proprofs.com/quiz-school/story.php?title=present-simple-vs-continuous

http://www.eflnet.com/grammar/presprog.php

http://englishtenses.eu/verbs-used-continuous-tenses

Verbs that are never used in Continuous http://englishtenses.eu/verbs-used-continuous-tenses/

https://www.englishpage.com/verbpage/types.html