应该是: I was sleeping when he came in. 再问: I was ____ ____when he ____ ____ 再答: 你好, 应该是: being asleep came in ~~~~~~~~~~~~~~~~祝你进步,如对你有帮助,请及时采纳~~~~~~~~~~~~~~~~~~ 再问: being是什么意思? 再答: 刚才看了看,是睡懒觉,那应该是 sleeping late came in 睡懒觉 sleep late ~~~~~~~~~~~~~~~~祝你进步,如对你有帮助,请及时采纳~~~~~~~~~~~~~~~~~~