改正下列各句中从句部分的错误 1.That we are doing has never been done befor

__we are doing has never been done before has been doing have been done区别 has been doing还是 has done 改正下列各句从句部分的错误 1.May i use the pen you bought it yesterday?2. 这是反意疑问句陈述部分是The work has never been done,疑问部分是什么 has everything that can be done been done句子里的that能不能省略,为什么?如 简单句、状语从句下列各句中均有一处错误,请找出并改正1.the police has(A) caught the thi john has never told anyone ( )he had done for a living befor 定语从句的问题：改正下列句中的错误 3）.下列个句中有关名词的用法正确吗?请画出错误部分并在后面的横线上改正.1.Mrs white has two chi all that can be done has been done Everything that can be done has been done,___?