By having to sleep in th open,he gets far closer to the world of nature than most of us ever do.这里的having起到什么作用?是动名词一般式吗?having to do是一个词组吗?这是新概念三27课的课文,译文：由于被迫在楼天

I like to sleep enough sleep I'd like to watch you sleep at night,to hear you breathe by my side. When I go to sleep I wanna go to sleep i want to yougood sleep. I just want to sleep I go to sleep tired I am a French,I want to learn Chinese by myself,having any method? I think having enough sleep is good being healthy是什么意思 having to sleep in the open,he gets f by having to sleep in the open,he gets far colser to the world of nature than most of us ever doby having to sleep in the open,he gets far colser to the world of nature than most of us ever do这句话的开头by是作为 “由于”的意思吗?还 late in the afternoon ,Bob turned off the alarmA To sleep B sleeping C sleep D having sleep I told you to go to sleep I only want to sleep ..sleep..请翻译为中文 It was _________ of you not to play the piano while I was having a sleep.A.generousB.considerateC.faithful D.conscious 15.I _____,the subject was always in my mind.A.Walking or sleeping B.Walking or slept C.Having walked or slept D.To walk and sleep I want to sleep,good night 求i want to sleep 英文歌