Simple past: http://www.englishpage.com/verbpage/simplepast.html

(rules for adding -ed): http://www.ego4u.com/en/cram-up/grammar/simple-past

 

Past continuous: http://www.englishpage.com/verbpage/pastcontinuous.html

(rules for adding -ing): http://www.ego4u.com/en/cram-up/grammar/past-progressive

 

Activities on simple past / past continuous:

http://www.englishpage.com/verbpage/verbs3.htm

http://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises

http://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex02

http://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex03

http://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex04

http://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex05

http://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex06

http://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex07

http://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex08

 

Present perfect: http://www.englishpage.com/verbpage/presentperfect.html

Difference present perfect / simple past: http://www.ego4u.com/en/cram-up/grammar/simpas-preper

 

Activities on present perfect / simple past:

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/exercises

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/exercises?ex02

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/exercises?ex03

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/exercises?ex04

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/exercises?ex05

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/exercises?ex06

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/exercises?ex07

http://www.ego4u.com/en/cram-up/grammar/simpas-preper/exercises?ex08

http://www.ego4u.com/en/read-on/countries/usa/tour/grand-canyon#exercises

http://www.ego4u.com/en/read-on/countries/uk/tour/edinburgh#exercises

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-66482.php

http://www.tolearnenglish.com/exercises/exercise-english-1/exercise-english-531.php

 

 

Past perfect: http://www.englishpage.com/verbpage/pastperfect.html

Activities on past perfect / simple past:

 

http://www.e-grammar.org/past-perfect-simple-continuous/test1-exercise2

http://www.englisch-hilfen.de/en/exercises/tenses/past_perfect_simple_past.htm

http://perso.wanadoo.es/autoenglish/gr.pastperf.i.htm

http://www.ejerciciodeingles.com/ejercicios-distinguir-past-simple-past-perfect-rellenar-huecos/

http://www.ego4u.com/en/cram-up/grammar/simpas-pasper/exercises

http://www.ego4u.com/en/cram-up/grammar/simpas-pasper/exercises?ex02

http://www.ego4u.com/en/cram-up/grammar/simpas-pasper/exercises?ex05

http://www.englishtenses.com/test/past_perfect_or_past_simple

http://www.englishpage.com/verbpage/verbs11.htm

 

 

Used to: http://www.englishpage.com/verbpage/usedto.html

Activities:

http://www.perfect-english-grammar.com/used-to-exercise-1.html

http://www.myenglishgrammar.com/english/exercise-11-used-to.html