1
https://www.englishgrammar.org/tenses-quiz-2/
2
https://www.ecenglish.com/learnenglish/verb-tense-review-quiz
3
https://www.englisch-hilfen.de/en/exercises/tenses/mix2.htm
4
http://esl.fis.edu/grammar/multi/r1.htm
5
http://utminers.utep.edu/micontreras/Verb%20Tense%20Quiz%201.htm
6
http://www.eflnet.com/grammar/verbtense.php
7
https://www.englishclub.com/esl-quizzes/grammar-5-tenses-2.htm
8
https://www.proprofs.com/quiz-school/story.php?title=past-present-future-tenses
9
https://www.proprofs.com/quiz-school/story.php?title=verb-tenses-quiz_3
10
http://www.softschools.com/quizzes/grammar/verbs/quiz236.html
