in and out是什么英语语法成分?The boss is in and out of the office all the time.是动词?come and go in and out 是副词?

and out是什么英语语法成分 in and out是什么英语语法成分?The boss is in and out of the office all the time.是动词?come and go in and out 是副词? soft fade-in and fade-out 是什么 英语语法：in what英语语法：Give a present,in what human relationship is good solve.中in what 是什么成分,麻烦分析一下句子? 英语语法：句子当中的born and brought up作什么语法成分?Some of them,born and brought up in rural village,has never seen atrain. like the stress in your life is spinning out of control这句话在句中是什么成分 like the stress成分?If you often feel angry and overwhelmed,like the stress in your life is spinning out of control,then you may be hurting your heart. day in and day out Falling in and out of zoom in and zoom out She lives in a house that she built herself out of trashout of trash 是什么成分是什么用法 问个英语语法问题In 2009,basic and applied research spending constituted 4.7% and 12.6% of total R&D expenditure,dropping from 2000 levels of 5.2% and 17%,respectively.这里的dropping作什么成分啊? down and out音标是什么? year in and year out,如何使用?介词应该是什么?给我写两个例句. sign-in and sign-out是什么意思 day in and night out 是什么意思? repeated day in and day out翻译 in-and-out在篮球中是什么意思 什么叫day in and day out?