Irregular verbs don’t follow the usual pattern in the present tense. Some irregular present tense verbs only change in the ‘I’ form. Some of the most common verbs in Spanish are irregular verbs. This ...

You use the perfect tense when, in English, you would say that something has happened. So, if you wanted to say: ‘You have been to the hairdresser,' 'she has eaten all the biscuits’ or anything else ...