Forming the Past Tense (Irregular Verbs)
Although many verbs in English form their past tense with -ED, some do not. These are called irregular verbs, and they include some of the most basic verbs in English. This page will explain some of the most important patterns in forming the past tense. However, the only way to know how an irregular verb will change in the past tense is to learn all of the important verbs.
The three most important irregular verbsThe three most important irregular verbs are BE, HAVE, and DO. BE is the most difficult, because its forms are different depending on the subject:
Other irregular verbsOther irregular verbs fall into three main categories: