有2种改法。如果just now做“立刻,现在”用的话就是进行时了The students are cleaning the classroom just now. 如果just now做“刚刚,刚才”用的话就是过去完成式。The students have cleaned the classroom just now.
有两种改法: 1.The students are cleaning the classroom just now.(just now的意思为立刻,这句话用的是现在进行时) 2.The students have cleaned the classroom just now.(just now的意思为刚刚,这句话用的是过去完成时)