it+be+adj+forsb.+todosth.什么是形式主语答:It took Professor Chomsky near a decade to finish writing this book.值得注意的是:在It is adj for sb to do sth 句型中,如果做表语的形容词是表现人的内在的性质特点的,如:honest,cruel,warm-hearted,stupid,nice,kind,careful,considerate,selfish,mean(小气的)等,需用of sb to do sth....