at three times和for three times一样吗I heard the door knocked at three times.这句中可以用for three times替代吗

at three times和for three times一样吗I heard the door knocked at three times.这句中可以用for three times替代吗 three time和 three times的区别 My father watches TV three times a week at home对three times a week 提问 three times every week he has three times at least to play it的意思three times at least 是怎么回事啊 I have been there( )three times.括号里加for吗 He has been to Beijing for three times 这里的for three times 是状语吗 那修饰什么吖 repeat three times是repeat it for three times的缩写吗?repeat it for three times 为什么也可写成repeat it three times介词for也可以省吗？ two or three times a week 和 twice or three times a week哪个对? Sometimes they eat it two or three times a day ------breakfast.A.to B.with C.at D.for应该选哪一个呢? 问一题英文填空在线哦You should take the tables three times a day,two at a t_____以t开头填一个字. i have been to the city three times.这个句子里three times 为什么前不加for 如果是many times或者就是times 呢 英语翻译At a rough estimate,Nigeria is---- Great Britain.A three times the size asB the size three times asC three times as the size of D three times the size of 每周几次（once/twice/three …times a week）前面用什么介词 A about B for C at 【原题】She reads English books ____once a week.A about B for C at three times和thirce的区别和关系 一道简单的初中英语选择提!--I've looked for it twice ,but I haven't found it.--Why not try____ A.three times B.once C.third times D.third time（答案是D.原因?xiexie ) 关于He can't be at home,isn't he?此句是否为反义疑问句?请问和He isn't at home,isn't he?有什么关系?为什么?也请解释一下“can't”在此处的意思.He must be a doctor,isn't he?You must have studied English for three years, If you don't want to late for class you should get up ____A.all the time B.at times C.at any D. on time