When a regular
present tense verb is changed to the
past tense, the ending of the word is changed. Regular past tense verbs have
-ed added to the end. If the verb ends in "e," then only
-d is added to the end.
The students bake a cake for their teacher. (Present tense)
The students baked a cake for their teacher. (Past tense)
The quick brown fox jumps over the dog. (Present tense)
The quick brown fox jumped over the dog. (Past tense)
When one of the "to-be" helping verbs (am, is, are, was, or were) is used in a sentence, add -ing to the end of the action verb.
The little boys eat their sandwiches at the table.
The little boys are eating their sandwiches at the table.
I play house with my younger sister.
I am playing house with my younger sister.