1.一般现在时：主动：He is a student of Beijing University.被动:He is enrolled by Beijing University.2.一般过去时：主动：He was my former boss.被动：I was employed by him.3.一般将来被动：This kind of t...好的。现在进行：The poor boy is being chased by the bad guys.将来进行： Many people believe that human brain is being replaced by computer.好像将来的和现在的差不多 或者 我想不起来了情态动词：He must be laughed by other boys or he will not be so depressed.不定式：It is said\ reported\told that they are gay.过去进行：He was being punished by his father at this moment last night.