Check in your grammar books or dictionaries ... As you can see from the beginning of this alphabetical list, many common verbs in English are irregular and I am afraid it is a matter of learning ...
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.
A regular verb is one that conforms to the rules of grammar, whereas an irregular verb is one that does not ... or plural by adding an -ed to the end of the verb. The following list shows you how to ...