Present Tenses

  1-Present Simple-Present Continuous

- https://www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive2.htm

- http://www.engelsgemist.nl/present-simple-present-continuous/

2- Present Perfect Simple and Present Perfect Continuous

- https://www.englishpage.com/verbpage/verbs8.htm

- https://elt.oup.com/student/solutions/upperint/grammar/grammar_01_012e?cc=global&selLanguage=en

3 - Present Tenses ( Present Simple, Present Continuous, Present Perfect, Present Perfect Continuous).

- https://usefulenglish.ru/grammar/tenses-exercise-two

- https://www.ego4u.com/en/cram-up/tests/language-course

 Past Tenses 

  4 - Past Simple and Past Continuous

- https://www.perfect-english-grammar.com/past-simple-past-continuous-exercise-1.html

- https://www.englisch-hilfen.de/en/exercises/tenses/simple_past_progressive.htm

- https://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex07

5- Past Simple and Present Perfect

- https://www.englisch-hilfen.de/en/exercises/tenses/simple_past_present_perfect.htm

- https://www.english-4u.de/en/tenses-exercises/perfect-past-simple.htm

6-Past tenses: Past Simple, Past Continuous and Past Perfect

- http://www.ice.urv.es/eoiact/level3/narrativetenses1.htm

- https://test-english.com/grammar-points/b1/past-simple-past-continuous-past-perfect/

- https://www.english-grammar.at/online_exercises/tenses/t071-the-lost-passport.htm

Have a look at the following presentation

Now, let's have some practice:

- Quiz 1

- Quiz 2