He 【had left】谓语【 when he came in the classroom 】状语 短暂性动词只是不能

对,要把相应的动词换成持续性动词的表达,或者短暂性动词的否定可以跟for since这些持续性的时间状语配合使用.
比如：He had been away since he came into the classroom.
leave(短暂性动词）——be away（持续性动词）
或者：He hadn't left until he came in the classroom.