用强调句结构最好,it is/was because--------that------,例如,I asked for leave because I was ill 可以改成:It was because I was ill that I asked for a leave.(正是由于生病我才请假。)
用强调句型it be ....that.....那这句就是it is because.....that I .....准没错
just because...... , I .....