Forms 8a, 8c. Past Simple vs Past Continuous. Used to/would/past simple

 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.ecenglish.com/learnenglish/lessons/past-simple-vs-past-continuous;

https://www.esl-lounge.com/student/grammar/2g50-past-simple-or-past-continuous-worksheet.php;

https://speakspeak.com/english-grammar-exercises/intermediate/past-simple-or-past-continuous;

https://www.focus.olsztyn.pl/en/exercises-past-continuous-test-2.html;

https://learnenglish.britishcouncil.org/grammar/intermediate-to-upper-intermediate/past-habits-used-to-would-and-the-past-simple;

https://www.englishgrammar.org/or-simple/.

Forms 6a, 6c. Future forms

 For practicing:

https://test-english.com/grammar-points/b1/future-forms/;

https://test-english.com/grammar-points/b1/future-forms/2/;

https://test-english.com/grammar-points/b1/future-forms/3/;

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-6874.php;

https://www.english-4u.de/en/tenses-exercises/future.htm.

Forms 6a, 6c. Past Simple. Comparisons

 For practicing Past Simple:

https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises;

https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?05;

https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?06

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

For practicing Comparisons:

https://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs/adjectives/exercises;

https://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjectives_comparison_as_as.htm;

https://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjectives_comparison_sentences.htm.

Forms 8a, 8b. Relative clauses. Comparisons

 For practicing relative clauses:

https://www.perfect-english-grammar.com/relative-clauses-exercise-1.html;

https://www.perfect-english-grammar.com/relative-clauses-exercise-2.html;

https://www.perfect-english-grammar.com/relative-clauses-exercise-3.html;

http://www.focus.olsztyn.pl/en-relative-pronouns-exercises.html#.X334aD9xfDc;

https://www.eltbase.com/get_quiz.php?id=56.

For practicing comparisons:

https://speakspeak.com/english-grammar-exercises/intermediate/comparatives-and-superlatives;

https://www.esl-lounge.com/student/grammar/4g2-the-the-comparatives.php.

Forms 6a, 6c. Past Simple. Irregular verbs. Making comparisons

 For practicing Past Simple irregular verbs:

https://www.perfect-english-grammar.com/irregular-verbs-exercise-1.html;

https://www.perfect-english-grammar.com/irregular-verbs-exercise-2.html;

https://www.grammarbank.com/simple-past-irregular-verbs.html;

https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises;

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

https://www.englishclub.com/grammar/verb-tenses_past_quiz.htm.

For practicing Comparisons:

https://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjectives_comparison_sentences.htm;

https://www.perfect-english-grammar.com/comparative-adjectives-exercise-1.html;

https://elt.oup.com/student/solutions/preint/grammar/grammar_04_012e?cc=lt&selLanguage=en;

https://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs/adjectives/exercises;

https://www.myenglishpages.com/site_php_files/grammar-exercise-grammar-comparatives-superlatives.php.

Forms 5ac. Past Simple (had, was/were, could, regular verbs)

For practicing:
The forms of have (have, has, had)
https://agendaweb.org/exercises/verbs/have-has-had.htm;
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-4262.php;
https://www.englisch-hilfen.de/en/exercises/tenses/have.htm;
Was/were
https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?03;
https://www.english-4u.de/en/tenses-exercises/was-were.htm;
https://www.englisch-hilfen.de/en/exercises/tenses/was_were.htm;
Could
https://agendaweb.org/exercises/verbs/modals/can-could-1;
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-91443.php;
https://www.perfect-english-grammar.com/modal-verbs-of-ability-exercise-1.html;
Regular verbs
https://agendaweb.org/exercises/verbs/past-simple/regular-forms;
https://www.englisch-hilfen.de/en/exercises/tenses/simple_past_statements.htm;
https://www.grammarbank.com/simple-past-tense-regular-exercise.html;
https://www.english-4u.de/en/tenses-exercises/past-simple2.htm.

Forms 7a, 7b. Future forms. Conditionals Types 0,1,2

For practicing:
will/be going to
https://www.englisch-hilfen.de/en/exercises/tenses/will_going_to_future.htm;
https://www.englisch-hilfen.de/en/exercises/tenses/will_going_to_future2.htm;
https://www.englishpage.com/verbpage/verbs18.htm
Present Continuous
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-118827.php
Present Continuous/be going to
https://www.englishexercises.org/makeagame/viewgame.asp?id=4291
will/be going to/Present Continuous
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-6874.php
https://www.englisch-hilfen.de/en/exercises/tenses/future.htm
Conditionals Types 0,1,2
https://www.englishexercises.org/makeagame/viewgame.asp?id=5990;
https://www.ego4u.com/en/cram-up/tests/conditional-sentences-2;
https://www.englisch-hilfen.de/en/exercises/if_clauses/mix2.htm;
https://first-english.org/english_learning/if_clauses_conditional/61_if_clauses_tests_type_1_type_2.htm.