be considered to do是一般过去式 be considered to have done是完成时，动作先于句子主语。例： He was considered to be wise.他被认为很聪明。 She is considered to have finshed her task.她被认为早已完成她的任务。
一个是过去式 一个是现在完成时态 意思一样 但是用的时间不一样而已
