句中为什么要用冠词A?Two days later a Mrs.Green called him and said that she and her husband had left their pet bear in their car outside the Century Hotelfor .这句中Mrs.Green前为什么用a?

句中为什么要用冠词A?Two days later a Mrs.Green called him and said that she and her husband had left their pet bear in their car outside the Century Hotelfor .这句中Mrs.Green前为什么用a? She is coming back in two days中为什么要用coming. I hear we will have a two-day holiday in two days' time.为什么holiday前用two-day,time前用two days',有区别么. ride a bike短语中为什么要加冠词a 英语冠词的使用What __ bad memory I have!句中划线处是否要填a,为什么? Two days a week father ,two,her,relaxes,days,week,a 连词成句 a new hairdressing salon will open in two days中in two days是什么成分? two days is not enough,he needs a third day为什么用a third 英语语法,比如,文章中有 He fell in love with Christine,a beautiful girl at the opera 句中为什么用冠词a 是什么语法现象 I'm afraid I won't be able to finish reading the book in two days.中为什么是won't 而不是will?in two days 不是用将来式吗 为什么要用过去式? tom borrowed my bike two days ago改为同义句tom ____ a bike ____ to me two days agoi ____ a bike ____tom two days ago 谓语动词,1 There is / are (a) 4 days' holiday in a month.2 There is / are a 4-day holiday in a month 1 第一句,谓语动词,是用 is ,还是 are ,要不要加 a 这个冠词?第二句 谓语动词用单数,还是复数?2 five days off .off 这 2.They left shanghai two days ago.（改同义句） They____ ____ ____ ____shanghai since two days a 新概念中这句话为什么火前用冠词a?原句They cooked a meal over a open fire. a (冠词)是an（冠词）的一种形式吗?还句话说，an (冠词)是a（冠词）的一种形式吗？我说的是做题时“用正确的形式填写”，文中要用a，这样子的 I want to buy MBA diploma .句中问号处用冠词an还是a? I would like a __ holiady.A.two days' B.two-day选哪个为什么