丙二烯结构式

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David has gone to the United States for vacation?can you tell me when he ______?A.has left B.lef IT是那两单词的缩写?译什么?IT业都做些什么? 比如说 He has stayed there for two hours recently.最近他在那停留了2个小时.现在完成时的完成用法里是不是也可以用延续性动词?表示动作开始于过去某个时刻,过了一段时间就结束了. how good the boy is!同义句转换改为()()()()he is ! 用 nine I work to go evening in the at 造句 同义句转换 1.Were are you friends from?2.How is the weather today?3.How good the boy is.4.You ca同义句转换1.Were are you friends from?2.How is the weather today?3.How good the boy is.4.You can go to school on foot.5.He buys his son a toy ca start,past,never ,nine,the,work ,l ,at,in,half ,evening 连词成句 look (how/what) excited the boys are! I go to bed at nine in the evening.(对划线部分提问)划线部分是:at nine I go to bed at nine o'clock in the evening.这句话里,atnine o'clock 和in the evening 两个短语能互换一下位置么?为什么 I usually go_bed at nine o'clock in the evening.I usually go 和bed at nine o'clock in the evening.中间的横线上应该填啥? can you tell me__? A.where Linda was B.Where is Linda C.where was Linda D.where Linda is 选哪个?求解释~ ----Can you tell me -----she is in the computer lab.A.where Linda was B.where is LindaC.where was Linda D.where Linda is Linda,could you tell me__?He is an actor A what he does B what does he do C where he works 要理由 西班牙语用英语怎么说十万火急啊 关于延续性动词完成时的问题He has stayed there for 2 years.He stayed there for 2 years这两句话有什么区别? You must finish____ (do )your homework before nine o'clock.空格应该填? He must finish his homework before 9 o'clock.用finish his homework提问What__ he __ before 9 o'clock I must finish my homework before eight o`clock.(变一般疑问句)怎么做?速度! be,must,by,home,we,6 o'clock(.)怎样连词成句? The boys are playing soccer happily in the park now.的同义句 He must (finish his homework) before 9 o'clock.对括号里的词提问.What he before 9 o'clock? the boys are playing soccer on the playground.------------------ 对画线部分提问晚自习马上要交了 the boys are playing soccer.(对划线部分提问) Excuse me,but can you tell me where the teacher's pffice is?Just a minute.I'll have Bob____(show) you there.是office Excuse me,could you tell me where the ________ room is?(twin) 音标中28个辅音20个元音分别是什么 Did the black bear talk to Jack?这句话用英语该怎么回答 这段话用英文和西班牙文怎么说重要的不是你想过和说过什么,而是你做过和没做过什么. Look at the children .They are playing soccer.这句话的同义句, They are playing games.They are very ____(relax) i_(leave) in a minue.i_(finish) all my work before i_(leave)这是很难得英语的练习题,