Forms 7a, 7c1, 7c2. Present Perfect

For practicing:

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

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

https://www.englisch-hilfen.de/en/exercises/questions/present_perfect.htm;

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

https://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_mix2.htm;

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

https://www.really-learn-english.com/present-perfect-exercises.html;

https://www.perfect-english-grammar.com/present-perfect-exercise-4.html;

https://www.perfect-english-grammar.com/present-perfect-exercise-5.html.
Quiz:
https://www.englishclub.com/grammar/verb-tenses_present-perfect_quiz.htm.

Form 6a. Plurals. Countable and uncountable nouns

For practicing plurals:
https://www.englisch-hilfen.de/en/exercises/nouns_articles/plural6.htm;
https://www.englisch-hilfen.de/en/exercises/nouns_articles/plural7.htm;
https://www.englisch-hilfen.de/en/exercises/nouns_articles/plural10.htm;
https://www.englisch-hilfen.de/en/exercises/nouns_articles/plural2.htm;
https://www.englisch-hilfen.de/en/exercises/nouns_articles/plural.htm.

For practicing countable and uncountable nouns:
https://www.englisch-hilfen.de/en/exercises/nouns_articles/countables.htm;
https://www.englisch-hilfen.de/en/exercises/nouns_articles/countables2.htm;
https://www.englisch-hilfen.de/en/exercises/nouns_articles/uncountable_nouns.htm;
https://www.englisch-hilfen.de/en/exercises/confusing_words/few_little.htm;
https://www.englisch-hilfen.de/en/exercises/confusing_words/few_little3.htm.

Form 6a. Quiz 8 - 3

1. vaisiai ir daržovės;                           
2. maistas ir gėrimai;
3. šeimos restoranas;  
4. šakutė ir peilis;                    
5.  puikus restoranas;
6. gerai paruoštas;                      
7.  pipirinis kepsnys;
8. keptas viščiukas;                    
9.  pomidorų sriuba;
10. makaronai su riebiu pomidorų padažu;  
11. gabaliukas puikaus šefo obuolių pyrago;
12. naminė duona;                               
13. specialūs ledai;                             
14.  maistas dviems;
15. druska ir pipirai;
16. puikus aptarnavimas;                         
17.  paslaugūs padavėjai;
18. nepamirškite užsisakyti staliuką;            
19.  nepraleiskite progos.

Forms 7a,7c1,7c2. Modals

For practicing:
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-55666.php;
http://www.servator.cat/eva/index_files/Grammar/2ndcycle/3rESO/should_must_2.htm;
https://www.englisch-hilfen.de/en/exercises/modals/must_not.htm;
https://www.englisch-hilfen.de/en/exercises/modals/must_not2.htm;
https://elt.oup.com/student/solutions/elementary/grammar/grammar_05_022e?cc=lt&selLanguage=en;
https://learnenglish.britishcouncil.org/en/intermediate-grammar/modals-1;
https://www.learnenglishfeelgood.com/esl-mixed-modals1.html;
https://www.test-english.com/grammar-points/a2/have-to-dont-have-to-must-mustnt/;
https://www.englishexercises.org/makeagame/viewgame.asp?id=3023;
https://www.e-grammar.org/modal-verbs-can-may-must/test2-exercise2/.
QUIZ:
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-87468.php.

Form 8b. 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;

http://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:
http://englishtenses.eu/past-perfect-past-perfect-continuous-exercise/.

Form 6b. Comparisons

For practicing:
https://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs/adjectives/exercises;
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://www.english-4u.de/en/grammar-exercises/comparison-adjectives.htm.

Forms 7a, 7c. Quiz 13 - 2

1.  Jaudinanti, įdomi savaitė;
2. maloni savaitė;
3. gauti laišką iš draugo;
4. gauti ypatingą pakvietimą;
5. turėti problemų su kažkuo iš šeimos;  
6. ginčytis su savo geriausiu draugu;
7. turėti sveikatos problemų;
8. sutikti įdomų žmogų;
9. važiuoti į ilgą kelionę;
10. važiuoti į trumpą kelionę;
11. gauti daug pinigų;
12. prarasti šiek tiek pinigų;
13. geros naujienos;
14. blogos naujienos.