Grammar video

Simple Past and Past Continuous:

Practica Wladi

USED TO: 

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

FIRST CONDITIONAL:

https://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-1/exercises?02

http://www.perfect-english-grammar.com/first-conditional-exercise-1.html

http://www.learnenglishfeelgood.com/grammar-firstconditional1.html

PRESENT PERFECT:

http://www.agendaweb.org/exercises/verbs/present-perfect 

http://mrbrownslearningspace.com/wp-content/uploads/2015/01/Present_Perfect_2.htm