has been working on his degree是什么意思

has been working on his degree是什么意思 John has been working on the essay whole afternoon and he still( Ahas been B does C has DisJohn has been working on the essay whole afternoon and he still( Ahas been B does C has Dis My sister has been working ()western China since graduated.A:at B:in C:on D How long has Greg been working on his degree--- five years?请翻译 has been worked和has been working的区别 She has been working for 20 hours He has been working here.为什么要用working? has been working 和was working有什么区别 he has been working on his book for the past two mouths when at last he got home翻译 He has been working on this research these three years and ( ) outstanding results.括号里面应该用 achieved 还是 has achieved? he has been working on the paper.请问此句话,work on有写的意思吗? 与writing the paper意思有区别吗? My father has been working on this farm for the whole five years 如果后面那个时间状语换成all 的要怎么换别乱说 I've Been Working on the Railroad 歌词 用括号里的词回答:1.How long has your sister been working here?(June)2.How long has that man been waiting?(twenty minutes)3.How long has that woman been sitting there?(8:30)4.How long has that boy been talking on the phone?(five minutes)5.How How he has done has great influence on the development of the factory he has been working in.1.这句话里面有哪些错误啊.2.怎么翻译这句话啊? 哪个对have she been working fou 1hour?/has she been working fou 1hour做否定回答呢 he()in the laboratory the whole morning.A.has been working ,B.is working,c.has worked After he has a rest,he goes on working.是什么意思?