1.If I were you ,I would go with him.如果我是你我就跟他走。 If I had time , I would attend the meeting.如果我有时间我就去参加会议。(我没有时间) 2.If I had gone to the party yesterday , I would have seen her.如果昨晚我去party了,我就会看到她了(我没去,也没看到她) 3.If it( should rain / were to rain /) rained tomorrow , the meeting would be put off.如果明天下雨,会议就会被推迟