雅思及物动词就是说这个动作可以施加到别的物体上,也就是后加宾语.例如：He opened the door.“open”这个动词可以施加到“door”上,那它就是及物动词,宾语door也不可省略,否则句意不完整.（不知道到底开的是什么）不及物动词就是一个动作不能施加到另一个物体上,也就是后面不能加宾语.例如：He is running.run这个动词就是不及物动词,后面不能加sth.（不能说跑什么东西）这就是及物和不及物的基本区别,学习单词时要参照提示的词性,在理解的基础上运用,因为英语里有的动词既可以是及物也可以是不及物的.vi—不及物vt—及物雅思
雅思not until/until两者皆可接延续性动词和暂短性动词.一、not...until指的是“直到...才”的意思,如 I did not go home until my mother called me.我直到我妈妈打电话给我才回家.not until的倒装与强调结构1.当Not until位于句首时,句子要倒装.其结构为:Not until+从句/表时间的词+助动词+(主句)主语+谓语+.如:①Not until the teacher came in did the students stop talking.直到老师进来学生们才停止讲话.②Not until next week will the sports meet be held.直到下周才开运动会.2. not until的强调结构为:It is / was not until+从句/表时间的词+that+.上面两句改为强调句为:③It was not until the teacher came in that the students stopped talking.④It is not until next week that the sports meet will be held.直到我结婚的时候,我才有钱买了自己的房子.It was not until I got married that I could afford to buy a house of my own.而until指“直到”.例如：Go alone the street until you see the traffic light.往前走,直到你看见交通灯.雅思</p 产品：澳博培训供货总量：不限产品价格：议定包装规格：不限物流说明：货运及物流交货说明：按订单
