朋友,很简单.只要FOR SB.这个结构放得进,就用主动语态,
如 English isn't easy to learn.------English isn't easy FOR ME to learn.
又如,His proposal has much to recommend------His proposal has much FOR YOU / FOR US / FOR THEM to recommend.
又如,I can't go out to play with you because there is a lot of work to do .-------I can't go out to play with you because there is a lot of work FOR ME to do.
又如,Tom says that the homework is hard to do-------Tom says that the homework is hard FOR HIM to do.
(明白了吗?)