we did study cloning.什么句子结构?为什么用助动词?和 clone的ing形式?

we did study cloning.什么句子结构?为什么用助动词?和 clone的ing形式? we did what we could to study well.=we did ____ _____ to study well. 英语翻译we prevent human cloning from ever happening before we destroy ourselves. We study with friends Why We Should Not Use Cloning 有关的作文谁有? 英语作文：Why Shoudn't We use cloning 要求：120字 “we must study them.是“we must study them. when did you star to study english? Why did you study English?怎样回答? why do we study English why do we study English So We must Study hard we study grammar and vocabulary We study for the revolution when did we 英语作文 题目：why shouldn't we use cloning?（为什么我们不要克隆 ）题目：why shouldn't we use cloning? （为什么我们不要克隆 ） 要求120字 请大家帮忙设计一个两人之间的英文对话.What is your opinion about cloning?Would you like yourself to be cloned?How should we exploit the method of cloning to the best of human advantages? we students should study hard为什么hard要在study.