it 用法..什么引导词The boy dived into the water and after _____ seemed to be a long time ,he came up again.B.what C.it 选B 因为 “it 填在此处没有有引导词,语法上是不允许的”请问这句解释是什么意思,

it 用法..什么引导词The boy dived into the water and after _____ seemed to be a long time ,he came up again.B.what C.it 选B 因为 “it 填在此处没有有引导词,语法上是不允许的”请问这句解释是什么意思, 下面这句话中,that引导的名词性从句作什么成分,是什么用法?His speech led me to the understandingthat it is important to learn English. Isn't it strange that the lazy boy这里Isn't it 是什么用法? 从句引导词的用法 宾语从句引导词用法 Please put the book _____ it belongs after you read it 填什么引导词 A .Where B.that 分析一下by+ 动名词 的用法什么叫引导的动名词提到谓语之前,比如They put out the fire by pouring water on it.帮我分析一下用法.在举点例子, this is the way how he did it 这里的HOW 引导的是什么从句,有这种用法吗? 定语从句、宾语从句、状语从句引导词有什么区别?what用于引导哪些从句及用法? by the time 的用法它引导从句时,主句和从句各用什么时态那么by the time 引导的从句,主句什么时候用现在完成时呢 for fear that,in case,lest引导目的状语从句什么有区别吗我的语法书上出现这样两个例子.不知道有什么用法上的区别：The boy hid himself behind the tree in case/for fear that his father should see him.Take your rainco 关于状语中引导词的时态用法,从句用什么时态,主句用什么时态? The boy is always kicking his younger brother about.中about什么用法 英语定语从句引导词用法 宾语从句中引导词的用法 什么是引导词?什么是限定词?用法呢? boy student是语法中的什么用法? It worried the mother a lot _______ she couldn't afford the medical treatment for her son.这个是什么从句?用什么引导词?为什么?