PAST SIMPLE TENSE

The past simple tense of the most english verbs (regular verbs) is formed by adding
"-ed"/"-d" to their base form. (If the verb ends in "-e", we add "-d" to form the past simple.)

There are also some verbs called irregular verbs that have special past tense forms.
week, three days ago, a few minutes ago, in (year), from (year) to (year), etc.

Spelling rules for the past simple of regular verbs:

 if a regular verb ends in consonant + y change y to i and add -ed:
  carry - carried,    study - studied,    fry - fried,    try - tried
 if a one syllable regular verb ends in consonant + vowel + consonant double the final consonant and add -ed -- > stop - stopped,  plan - planned,   rob - robbed,   beg - begged
 if a regular verb has more than one syllable and ends in consonant + vowel + consonant, we double the final consonant only if the final syllable is stressed -- >  preFER - preferred,    regRET - regretted

Exception: In British English verbs ending in -l have -ll before -ed whether the final syllable


EXERCISES!!!!!

http://www.englishexercises.org/makeagame/viewgame.asp?id=3303


http://www.englishexercises.org/makeagame/viewgame.asp?id=3686