Complex sentence: 'Is' is sometimes used however for he, she and it and in the past tense,'were' is used for all the personal pronouns except the now largely archaic'thou', which uses'werst'.
Split into simpler sentences: 'Is' is sometimes used however for he, she and it. In the past tense,'were' is used for all the personal pronouns except the now largely archaic'thou', which uses'werst'.