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His brother trys to get top score in English this year.
His brother try to get top score in English this year.
His brother tries to get top score in English this year.

His brother trys to get top score in English this year.     Лишнее

перые два предложения неправильные, неверно образована форма глагола в present simple 3 лицо ед.ч.

третье предложение правильное