It was yesterday that he met Li Ping.强调时间状语
It was on Monday night that all this happened.所有这一切发生在周一晚上.强调时间状语
It is you and Tom that didn't com yesterday.强调主语
It was him that I talked with.宾语
It was yesterday that he met Li Ping.强调时间状语
It was on Monday night that all this happened.所有这一切发生在周一晚上.强调时间状语
It is you and Tom that didn't com yesterday.强调主语
It was him that I talked with.宾语