Ciao Leodomi, Forming the past simple tense using the verb 'to be': I , he, she : was you, we , they : were I was at work yesterday. We were not late for the train. They were very happy last time we met them. He was my roommate for 2 years, when I was living in Milano. The past simple tense using verb 'to have' : 'had' is used with all personal pronouns " I ,you,she,he ,we ,they" We had a good time last night. He had a dog and 2 cats. The irregular verbs ( i verbi irregolari) are conjugated in different ways . You can check this list of irregular verbs an their conjugation in Past tense here: http://www.englishpage.com/irregularverbs/irregularverbs.html He began (begin) learning English one year ago. She brought ( bring )me a very nice present on my birthday last week. He drove (drive) all night long. She ate (eat) a lot in yesterday's party.She better watches her diet. He is Italian, but he grew (grow) up in Australia. They paid ( pay) a lot for this fancy house.