例句：I didn't know if he would come.　　=I didn't know if he was going to come.　　我不知道他是否会来.　　She was sixty-six.In three years,she would be sixty-nine.　　她66岁了.三年后,她是69岁.　　She told us that she would not go with us,if it rained.　　她告诉我们,如果下雨,她就不和我们一起去了.　　I didn't know how to do it.What would be their ideas?　　我不知如何去做,他们会有什么想法呢?　　2.过去将来时常可用来表示过去习惯性的动作.此时,不管什么人称,一律用would.　　This door wouldn't open..　　这扇门老是打不开.　　Whenever he had time,he would do some reading.　　他一有时间,总是看书.　　I would play with him when I was a child.　　当我还是孩童时,总是和他一起玩.如:　　You know I would come.你知道我会来的.　　We never imagined that John would become a doctor.我们从未想过约翰会成为一个医生.　　过去将来时有时可带时间状语.如:　　He said he would come back the next day.他说他第二天回来