Irregular verbs: forming the past tense

The present tense is used for an action that is taking place now. The past tense is used for an action that has already happened (this could be yesterday or a hundred years ago). Although many English verbs form their past tense by adding the suffix -ed, some do not. These are called irregular verbs. Can you write the past tense for each of these verbs and then learn how to spell them?