Add "ed" to verbs for the Past Tense

When we talk about the past, we have to add an "-ed" to regular verbs to make the second form. Irregular verbs are tricky and have their own sets of rules. Drink, for example, turns to "drank." Most of the time, though, "-ed" will do.

For example: 

• I drank a lot of Lapsang Souchong tea yesterday, but Mary didn't.
• The dogs stopped barking two seconds ago, and I am feeling better.
• Mary played fetch with her hyperactive dog.

You can find more information in: 

http://www.perfect-english-grammar.com/past-simple.html

http://www.manythings.org/wbg/verbs_past1-mw.html

http://www.perfect-english-grammar.com/past-simple-exercise-7.html

http://www.englishpage.com/irregularverbs/irregularverbs.html