There are
great many verbs in English. The biggest part of them are regular verbs and
much less one is formed by irregular verbs. Regular verbs form their past form with
addition –ed at the end of them. For example, work – worked, walk - walked, look - looked etc. But it’s necessary to
remember some rules. If a verb ends with letter “e” add to this verb only one letter “d”
instead “-ed”. Look at the sample solve - solved. It\s possible to write more
but it takes me too mach time.