关于that is这个用法的问题.ECT4的作文范文里面有这样一句话“children who are paid for doing housework will get into the habit of doing nothing for free,that is ,they will become profit-oriented.”请问插入语that is有什么

关于command的用法关于“command”的用法 例如这个句子 It is a painting that commanded a handsome price. command是什么意思? 关于that is这个用法的问题.ECT4的作文范文里面有这样一句话“children who are paid for doing housework will get into the habit of doing nothing for free,that is ,they will become profit-oriented.”请问插入语that is有什么 e.g.（举例）和ect（等等）的用法ect表示等等,那个标点该怎么加啊,ect.e.g. ect.这个缩写的单词在句子中怎么读? prototype 的英文解释中,etc后面的has是啥意思?是什么用法啊?the first form that a new design of a car,machine ect has,or a model of it to test the design before it is produced. （）ect的首字母 想问一个关于英语的问题.A plane is a machine that can fly.这个句中的that所做的是什么成分呢? insist + insist坚持求他后边介词的用法,包括ON,OF,FROM（?）ECT． it is high time that的用法 It is/was time that 的用法 that is because的用法没弄懂 关于It is +adj +that这个句型的问题为什么有It is a pity that It is 后面不是应该加形容词吗?a pity是名词吧 谁知道that is that的意思?似乎是某种固定用法. that the evidence is inconclusive,请解释一下that的用法 it is a shame that用法it is a shame that虚拟语气的用法 that在许多句子里的用法It's pity that.这个that是什么意思呢,或是什么用法?还有silence is the sleep that nourishes wisdom这里的that又是什么意思呢 想问个关于it用法的问题我想不通 In fact it is a hard job for the police to keep order in an important football match.这句前面的it 为什么不能换成this或者that 关于英语语法[表语]的定义[whose is that handbag]书上说whose是that handbag的表语,个人感觉这个说法有问题,请问题个说法是出版时的疏忽,还是确实就是这样.