he were sleeping when the UFO arrived.为什么用were

he were sleeping when the UFO arrived.为什么用were when he got home ,his parents _.were sleep were asleep are sleeping为什么? when you were sleeping He was nervouns because I n______ his hands wHe was nervouns because I n______ his hands were shaking. 谢谢 Tom used to be a lazy boy,he () while his classmates were studying.A.were sleeping B.was sleepingC.sleeping D.sleeps 帮我看看as if后面be动词的用法区别He looks as if he were ill.He looks as if he is ill.都是他仿佛病了.还有He looks as if he were sleeping.和He looks as if he is sleeping.都是一个意思,用were的一定是虚拟语气了,但 Were you sleeping when Tom phoned you? SLEEPING sleeping sleeping Sleeping sleeping He was sleeping late when it arrived he is used to sleeping ____ 2、Where’s John?.A:He’s sleeping.B:She’s sleeping.C:He’s sleep. he w as sleeping alll day long. he was sleeping during ___ ____ ___ 有这个神话故事吗?北欧神话?an army of 2000 chineese came to sweden.they tried to kill a man.his name was chinesersugerkuk and he killed them all.he thought that they were sleeping the buses,most ___ _____were already full ,were surrounded by many passenfers whe were going to wor定语从句填空