Forms 5ac. There is/ There are. This/ These - That/ Those. Have got

For practicing:
https://www.englisch-hilfen.de/en/exercises/various/there_is_there_are.htm;
https://www.englisch-hilfen.de/en/exercises/various/there_is_there_are3.htm;
https://www.englishexercises.org/makeagame/viewgame.asp?id=4627;
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-116171.php;
https://elt.oup.com/student/solutions/elementary/grammar/grammar_03_012e?cc=lt&selLanguage=en;
https://www.englisch-hilfen.de/en/exercises/confusing_words/some_any2.htm.

https://www.englisch-hilfen.de/en/exercises/various/this_that.htm;
https://www.perfect-english-grammar.com/this-that-these-those-exercise-1.html;
https://www.englishexercises.org/makeagame/viewgame.asp?id=4617;

https://www.englisch-hilfen.de/en/exercises/tenses/have_got.htm;
https://www.english-4u.de/en/grammar-exercises/have-got.htm;
https://www.grammarbank.com/have-has-got-exercise.html.
QUIZ:
https://www.english-at-home.com/grammar-there-some-any/.

Forms 7a, 7b. Past Simple vs Past Continuous

For practicing:
https://www.perfect-english-grammar.com/past-simple-past-continuous-exercise-1.html;
https://www.perfect-english-grammar.com/past-simple-past-continuous-exercise-2.html;
https://www.englisch-hilfen.de/en/exercises/tenses/simple_past_progressive.htm;
https://www.ecenglish.com/learnenglish/lessons/past-simple-vs-past-continuous;
https://elt.oup.com/student/project3rdedition/level5/unit1/grammar/exercise1?cc=lt&selLanguage=en;
https://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex07;
https://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex08;
http://www.esl-lounge.com/student/grammar/2g50-past-simple-or-past-continuous-worksheet.php;
https://www.englishgrammar.org/simple-or-continuous-tense-exercise-2/.
QUIZ:
http://learnenglish.britishcouncil.org/grammar/beginner-to-pre-intermediate/past-continuous-and-past-simple.

Forms 8a, 8c1, 8c2. Past Perfect vs Past Perfect Continuous

Practicing Past Perfect:

https://engelsklaslokaal.nl/en/english-grammar-exercises/one-english-verb-form/past-perfect/;
Practicing Past Perfect Continuous/Progressive:
https://engelsklaslokaal.nl/en/english-grammar-exercises/one-english-verb-form/past-perfect-continuous/;
Practicing Past Perfect vs Past Perfect Continuous:
https://elt.oup.com/student/solutions/upperint/grammar/grammar_02_022e?cc=lt&selLanguage=en;
https://speakspeak.com/english-grammar-exercises/upper-intermediate/past-perfect-simple-vs-past-perfect-continuous;
http://www.tinyteflteacher.co.uk/learning-english/grammar/exercises/past-perfect-2.html;
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-9553.php;
https://www.englishpage.com/verbpage/verbs13.htm.
QUIZ:
https://www.e-grammar.org/past-perfect-simple-continuous/test1-exercise1/.

Form 5ac. Revision on grammar

For practicing:
https://www.learnenglishfeelgood.com/english-verbs-tobe1.html;
https://www.grammarbank.com/verb-to-be.html;
https://www.perfect-english-grammar.com/present-simple-exercise-11.html;
https://www.perfect-english-grammar.com/present-simple-exercise-14.html;
https://www.perfect-english-grammar.com/present-simple-exercise-15.html;
https://www.englishexercises.org/makeagame/viewgame.asp?id=2842;
https://www.englishgrammar.org/pronouns-exercise-beginner-level/;
https://www.englisch-hilfen.de/en/exercises/plural1/index.php;
https://www.englisch-hilfen.de/en/exercises/nouns_articles/plural2.htm;
https://www.englishexercises.org/makeagame/viewgame.asp?id=723.

Form 7a. Present Simple vs Present Continuous. Adverbs of frequency

For practicing:
https://www.perfect-english-grammar.com/present-simple-exercise-7.html;
https://www.perfect-english-grammar.com/present-continuous-exercise-1.html;
https://www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive2.htm;
https://www.perfect-english-grammar.com/present-simple-present-continuous-1.html;
https://www.english-4u.de/en/tenses-exercises/present-simple-progressive2.htm;
https://www.myenglishpages.com/site_php_files/grammar-exercise-adverbs-frequency.php;
https://elt.oup.com/student/solutions/elementary/grammar/grammar_02_012e?cc=lt&selLanguage=en.
QUIZ:
https://www.proprofs.com/quiz-school/story.php?title=present-simple-vs-continuous.

Form 5ac. Verb 'to be'. Pronouns. Plurals

For practicing:
https://www.englisch-hilfen.de/en/exercises/tenses/be3.htm;
http://www.eclecticenglish.com/grammar/PresentSimpleToBe1A.html;
https://www.englishexercises.org/makeagame/viewgame.asp?id=2813;
https://www.myenglishpages.com/site_php_files/grammar-exercise-be-present.php;
https://www.englisch-hilfen.de/en/exercises/pronouns/personal_pronouns.htm;
https://www.englisch-hilfen.de/en/exercises/pronouns/mix.htm;
https://www.ego4u.com/en/cram-up/grammar/pronouns/exercises?02;
https://www.ego4u.com/en/cram-up/grammar/pronouns/exercises?03;
https://www.englisch-hilfen.de/en/exercises/nouns_articles/plural6.htm;
https://www.englisch-hilfen.de/en/exercises/nouns_articles/plural7.htm.
QUIZ:
https://www.proprofs.com/quiz-school/story.php?title=njy0mdk4j4vw;
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-80258.php;
https://www.proprofs.com/quiz-school/story.php?title=plural-noun-test.

Form 7b. Past Simple. Used to

For practicing:
https://www.english-4u.de/en/grammar/past-simple.htm;
https://www.perfect-english-grammar.com/past-simple-exercise-8.html;
http://www.esl-lounge.com/student/grammar/3g80-intermediate-past-simple-or-used-to-gap-fill-exercise.php;
https://www.perfect-english-grammar.com/used-to-exercise-2.html.
QUIZ:
https://www.englishclub.com/grammar/verb-tenses_past_quiz.htm;
https://www.proprofs.com/quiz-school/story.php?title=used-to-past-simple.