Brief explanation of expressing the future, in Spanish, and links

Futuros (this explanation is not complete and it only shows a general and basic difference):

Will – decisiones espontáneas que se toman mientras se habla: 

look! I have one euro in my pocket! I will buy some bread!

Going to – decisions espontáneas ya tomadas: 

before I have seen that I don´t have bread, I´m going to buy bread tomorrow

before I have found a euro in my pocket, I´m going to buy son e bread with it

Presente simple – planificadas y no dependen de nosotros: 

the train leaves tomorrow at 7.30 

Presente continuo – planificadas y dependen de nosotros: 

we are leaving tomorrow at 7.30 by car

Links explaining future forms:

This is the best explanation in Spanish, very clear, with a lot of exercises at the end:

http://www.ejerciciodeingles.com/formas-verbales-del-futuro-en-ingles/

Another explanation in Spanish:

http://elblogdelingles.blogspot.com.es/2010/11/el-futuro-en-ingles.html

Explanation in Spanish with video:

http://www.blueblocnotes.com/grammar/future-tenses/comparison

Spanish explanation with exercise:

http://www.mansioningles.com/gram41.htm

Explanation in English with exercises:

http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/410-expressing-the-future.htm

Explanation in English with a comparison with French:

http://linguapress.com/grammar/future.htm

Explanation of future forms in English:

http://www.usingenglish.com/articles/ways-expressing-future-in-english.html

Introduction to future forms

Form and examples of the future with will. Possibility of listening the examples:

http://www.curso-ingles.com/gramatica-inglesa/futuro-simple.php

Future with will. Explanation in Spanish and exercise:

http://curso-gratis-ingles.euroresidentes.com/2006/01/el-futuro-en-ingls-con-will.html

Will or going to?

http://www.gcfaprendelibre.org/ingles/curso/ingles_avanzado/oraciones_en_futuro_en_ingles/2.do

Explanation in Spanish of expression of future tense:

http://www.mansioningles.com/gram41.htm

Different expressions of future tense:

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

Say or tell?

Exercise in English:

http://www.learnenglishfeelgood.com/sp/vocabulario-tell-say1.html

Brief explanation in Spanish:

http://www.ompersonal.com.ar/omgrammar/say-tell.htm

Brief explanation in Spanish and exercise:

http://www.ejerciciodeingles.com/ejercicios-say-tell/

Say and Tell exercise with answers:

http://www.perfect-english-grammar.com/say-or-tell-exercise-1.html

Explanation in English and final quiz:

http://www.englishclub.com/vocabulary/cw-say-tell.htm

Say, tell and ask, explanation with exercise:

http://www.ecenglish.com/learnenglish/lessons/how-use-say-tell-and-ask

As or Like?

As and like explained in Spanish

http://www.curso-ingles.com/gramatica-inglesa/like-as.php

As and like explained in Spanish with exercises:

http://www.aulafacil.com/Ingejerc/Lecciones/Lecc36.htm

As and like explained in English:

https://learnenglish.britishcouncil.org/es/grammar-reference/and

As and like, BBC explanation:

http://www.bbc.co.uk/worldservice/learningenglish/grammar/learnit/learnitv63.shtml

As and like exercise with answers:

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

As and like explanation with activity:

http://www.grammar.cl/Notes/Like_vs_As.htm

So...past simple or continuous?

Past simple and continuous, explained in Spanish:

http://www.vitutor.com/gramatica_inglesa/verb_tense/past_simple_continuous.html

Past simple and continuous, explanation in Spanish and exercise:

http://www.aulafacil.com/Ingejerc/Lecciones/Lecc19.htm

Explanation in video:

http://www.blueblocnotes.com/grammar/past-tenses/past-simple-and-continuous

Past simple and continuous. Summary in Spanish:

http://www.english-area.com/paginas/pasadosimplevspasadocontinuo.pdf