PAST TENSES

Past Simple and Past Perfect
https://www.ego4u.com/en/cram-up/grammar/simpas-pasper/exercises
https://www.ego4u.com/en/cram-up/grammar/simpas-pasper/exercises?ex03
https://www.ego4u.com/en/cram-up/grammar/simpas-pasper/exercises?ex05


Past Simple and Present Perfect
http://www.perfect-english-grammar.com/past-simple-present-perfect-1.html
http://www.perfect-english-grammar.com/past-simple-present-perfect-4.html

Past Simple, Past Perfect and Past Continuous
http://www.englishtenses.com/quiz/sherlock

Mixed Past tenses
http://www.englishtenses.com/test/romance_novel_past_tenses