Spelling rules -ed endings

http://www.slideshare.net/guestfdb578/verbos-regulares-e-irregulares-claudia-vega-3-bp

How to pronounce -ed?

http://www.englishclub.com/pronunciation/-ed.htm

past tense

Exercises

http://www.english-room.com/pasttense_6a.htm

 

http://engalego.es/almacen/lim/past2/past.html

was were

Exercises

 

http://es.scribd.com/doc/4672573/WAS-WERE-exercise

 

http://www.language-worksheets.com/was-were-elementary.html

Present continuous exercises

http://www.eclecticenglish.com/grammar/PresentContinuous1F.html

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

Present continuous