All links of English Tenses Exercises

Mixed tenses - 1
Mixed tenses - exercise 1 (agendaweb.org)

Easy sentences in the Simple Present – Exercise 3
Easy sentences in the Simple Present – Exercise 3 (englisch-hilfen.de)

Present Simple Negation - Exercise
Present Simple Negation - Grammar Exercise | English4u (english-4u.de)

Verb Tense Exercise 1Simple Present and Present ContinuousSimple Present and Present Continuous Exercise | ENGLISH PAGE
Grammar Exercises - Mixed Tenses Exercises
Grammar Exercise - English Tenses Review (myenglishpages.com)