易混淆的从句解析易混淆的从句解析v强调句与主从复合句的比较强调句与主从复合句的比较 It was in 1990 that he joined the army。It was 1990 when he joined the army。It was for the first time that he attended such an important meeting.It is/was the first time that he has/had attended such an important meeting.强调强调定语定语v强调句与主语从句强调句与主语从句It was obviously that he cheated me.It was obvious that he cheated me.强调句强调句主语从句主语从句强调句和时间状语从句强调句和时间状语从句 It was ten years ago that he left his hometown.It was/will ten years before he left/leaves his hometown.It i