Simple future: http://www.ego4u.com/en/cram-up/grammar/future-1-will

 

Be going to: http://www.ego4u.com/en/cram-up/grammar/future-1-going-to

 

Present continuous:

http://www.grammaring.com/present-continuous-for-fixed-future-arrangements

http://www.english-area.com/paginas/continuovalorfuturo.pdf (SPANISH)

 

Difference simple future / be going to:

http://www.englishpage.com/verbpage/simplefuture.html

http://madridingles.es/post/19393778650/will-and-going-to-tiempos-verbales-el-futuro (SPANISH)

http://www.english-area.com/paginas/futurosimplevstobegoing.pdf (SPANISH)

 

Difference  be going to / present continuous:

http://www.aulafacil.com/Ingejerc/Lecciones/Lecc18.htm

 

Difference will / be going to / present continuous:

http://www.grammaring.com/the-difference-between-will-be-going-to-and-present-continuous-for-future-events

CHART: http://www.grammaring.com/sites/default/files/images/cheatsheets/will-be-going-to-present-continuous.jpg

 

Future continuous:

http://www.englishpage.com/verbpage/futurecontinuous.html

http://www.grammaring.com/future-continuous

 

Future perfect:

http://www.englishpage.com/verbpage/futureperfect.html

http://www.grammaring.com/future-perfect

 

Activities on Simple future / Be going to:

http://www.englishpage.com/verbpage/verbs18.htm

http://www.englishpage.com/verbpage/verbs19.htm

http://www.englishpage.com/verbpage/verbs20.htm

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

http://www.english-4u.de/future_ex4.htm

http://www.english-4u.de/future_ex5.htm

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

 

Activities on Simple future / Be going to/ Present continuous:

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-6874.php

http://www.englishexercises.org/makeagame/viewgame.asp?id=4180

http://www.ego4u.com/en/cram-up/grammar/future-mix/exercises

http://www.englishpage.com/verbpage/verbs24.htm

http://www.montsemorales.com/gramatica/Futurtenses.htm

http://www.better-english.com/grammar/decisions.htm

http://www.english-4u.de/future_ex3.htm

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

http://www.xtec.cat/centres/a8060231/exerc_06/quart4/fut.htm

http://testyourenglish.org/test-58

 

Activities on Future continuous / Future perfect:

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-5110.php

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-66796.php

http://www.ejerciciodeingles.com/ejercicios-verbos-futuro-future-progressive-future-perfect-rellenar-huecos/

http://learnenglish.britishcouncil.org/en/grammar-reference/future-continuous-future-perfect

http://www.ejerciciodeingles.com/ejercicios-hablar-futuro-future-perfect-future-progressive/

http://www.esl-lounge.com/student/grammar/4g9-future-continuous-perfect.php

http://www.ejerciciodeingles.com/ejercicios-distinguir-future-progressive-future-perfect-ingles-rellenar-huecos/

http://www.esl-lounge.com/student/grammar/4g9-future-continuous-perfect.php