Bibliography

https://www.youtube.com/watch?v=i-3kGNbZUXE

https://www.educaplay.com/learning-resources/2927042-verb_to_be.html

https://www.educaplay.com/learning-resources/4632403-verbo_to_be.html

https://www.slideshare.net/IvanMezaSalazar/verb-to-be-present-197032284?qid=50fa11f3-0a54-4651-b471-0b91dabbdcd4&v=&b=&from_search=56