He is ＿＿＿＿（睡觉）,是应该填“sleep”还是写“sleeping”呢?为什么?

He is ＿＿＿＿（睡觉）,是应该填“sleep”还是写“sleeping”呢?为什么? He is sleeping等于He is ＿＿＿ 该睡觉了是time for sleeping 还是time for sleep? 去睡觉时go to sleep 还是go sleeping? 我喜欢睡觉.是I like sleeping/ sleep? My lifestyle is the same＿＿yours中间空白应该填什么?为什么呢? Don't sing.She _____(sleep).是is sleeping还是asleep,求详解 英语翻译是i will going to sleep呢?还是i will going to sleeping呢?还是i during sleeping还是during sleep 是sleep for an hour 还是 sleeping for an hour But now he ___(sleep) at home.（正确形式填空） 是 is sleepping 还是 sle What is he doing?答案我想就用一个词是用Sleep.还是Sleeping.是不是象动词开头都要原形祈使句