Peter is having dinner now.(时间改成just now,并改变时态）
问题描述：
Peter is having dinner now.(时间改成just now,并改变时态）
答
just now作“刚才”、“一会儿之前”解时,常与一般过去时连用,位于句首或句末
所以改变时态后的句子应该是：Peter had dinner just now .