新概念17课`they are keyboard operator为什么用这句```而不是用their are 难道用their

新概念17课`they are keyboard operator为什么用这句```而不是用their are 难道用their Here they are.是什么意思?新概念1册的15课:Here they are.翻译成给你.为什么不是Here you are.呢? 新概念NCE3 第一课教材中的一道练习题 关于except的用法：Pumas never attack a human being except( ）cornered.A.they are B.being C.that they are D.when they are 不解.但可以肯定的是,这里的Except表示的是“除非”. 新概念英语 They _________ a good time,______ they?A have; do B have; don't C are having; areD are having; aren't They are teaching_____English.They are teaching_____English.A、themB、theirC、themselves大家讲讲为什么啊说实话，我这是新概念1册新东方老师讲的一道题 They are they are Are they They are -------are they?they are --------(tomato) 新概念3第一课课后习题第七题Pumas never attack a human being excpt _____ conered.A they areB beingC that they areD when they are请问选哪一个?为什么?请说明为什么其他三个不能选 最好说一下except的用法 那为什 the moment和 at that moment 是否可以互换?新概念第一册57课中 In the evening,the children usually do their homework,but this evening,they are not ding their homework.At the moment,they are playing in the garden.请问,at the moment 是 新概念1册20课的单复数问题句子：Are that boy's shoes dirty?No,they aren't.（1）问：为什么不是Are those boy's shoes dirty?复数,不是要将that变成those的吗?句子：1)Those children are tired.2)Their mother is tired,too. 新概念英语几道选择题1.during this time,they will give five performances.that's what they'll do _this time. A.in B.on C.for D.while 2.they are pop singers.so_ A.they are folk singers B.they are public singers C.everyone likes them3.the green Pumas never attack a human being except( )cornered?括号里的选项：A. they areB. beingC. that they areD. when they are这是新概念中的题,给出的答案是D,不清楚为什么?请教一下大家~~! are the children tired or thirsty 这个句子对吗还有are his shoes dirty or clean 回答都是they're not dirty they're clean,新概念英语里面都是这样写的,我觉得应该是错的 --Are they ( ) buuks?No,they are not .--They are ( ) buuks. They are green.They are long.They are g( ) b（