http://ask.yygrammar.com/app_q-38841.html#
老师之前回答过相关问题。
一,请问It is believed that Tom will like football如何改为sb is believed to…结构?
二,sb is believed to have done中的done为静态动词be,like…时,该不定式完成式到底是表示该状态从过去持续到现在还是仅仅表示过去的状态?是与之后的for three years和when he was young有关吗?
三,学生来转换一下,看对不对,It is believed that Tom is being clover.转为Tom is believed to be being clover.(暂时的,假装出来的聪明)