GG EP, EI, 12/14/2015 & 12/15/2015.

Murphy, Units 9-14, 19-22.
Hancock, Units 8 and 9.

Here is a fine table of verb tenses. Click on the tense you want to study, and the link will lead you to a page with some explanations and examples. Below them, you will find links to different kinds of exercises..