Forms 5a, 5c. Verb 'to be'. Pronouns. Plurals

 For practicing TO BE:

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;

For practicing PRONOUNS:

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;

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.