"He is turning it on for the first time"是什么用法?

"He is turning it on for the first time"是什么用法? it is the first time that he ___late for school it is the first time 用法 it is the first time 句型用法 He doesn't know what to say,for it is the first time that he It is the first time that he (is \was)late for school for the first time 用法. it is/was the first time that有什么用法 It is the first time he( )in public. It is the first time for him to do THE WORK IS TOO HARD FOR HIM.HE ___FINISH IT ON TIME.A:CAN N the first time,for the first time,by the first time用法区别