my tongue was busy searching out the hole where the tooth had been,最后的had been是什么用法为什么要用过去完成时,省略的什么,

my tongue was busy searing out the hole .searing out 是动名词吗?还是动词? my tongue was busy searching out the hole where the tooth had been.最后为什么要用过去完成时,要省略. 填空 Meanwhile my tongue was busy ____my tongue was busy~（a)however (b)In the mean time (c)Nevertheless（d)Although (见新概念二第四十八课多项选择题） my tongue was busy searching out the hole where the tooth had been,最后的had been是什么用法为什么要用过去完成时,省略的什么, 请问这句如何理解 my tongue was busy searching out the hole where the tooth had been?那The tooth had been in the hole呢? my tongue was busy searching out the hole where the tooth had been.最后had been省略掉了什么部分为什么省略 my tongue was busy searching out the hole where the tooth had been的句子成分?my tongue（主语） was busy（表语） searching out the hole（?） where the tooth had been（是定语从句修饰hole还是地点状语从句?） It's on the tip of my tongue是什么意思. 新概念英语2册48课问题.Meanwhile,my tongue was busy searching out the hole where the tooth had been.请问这里的where引导的是什么从句where the tooth had been.后面怎么没有宾语啊? My weekend was very busy 用very busy提问 My weekend was very busy.(对busy提问） My weekend was busy( 根据busy 提问） My last weekend was busy.有待 My teacher was busy yesterday同意句 My friend was busy on the weekend. bite my tongue是什么意思 英语从句的区别I lived in the village at which I was born请问这是什么从句I lived in the village where I was born请问这是什么从句I lived in which I was born这是什么从句my tongue was busy searching out the hole where the too Last Saturday I was busy _____ my homework and my mother was busy _____ the housewok.