一、以形式主语it 引导的句型。 句型1. It (so) happened that +clause. = sb. happened to do sth. =sb.did sth. by chance. 如： It happened that he was out when I got there. 当我到那儿时，碰巧他不在。He happened to be out when I got there = He was out by chance when I got there. 第1 页/ 共26 页 句型2. It seems that sb. do/ be doing/ have done/ had done= Sb. seems to do/ be doing/ have done/to be done/to have been done （还有动词appear 等可这样使用）如: It seemed that he had been to Beijing before. 他好象以前去过北京。He seemed to have been to Beijing before.
