The challenge we face is to find ways to meet the needs of our growing
population while _______(protect) the environment.这里填protecting是省略了主语和be动词吗?但是主语不是the challenge吗?
老师您好,请问used to be这种结构(过去是、曾经是)是否可以接确认性表语,表特指某一独一无二的人或物?比如:She used to be the
intellectual girl whom we were all appreciated.Shantou used to be the
economically backward city.(自己造的句子)谢谢...
向尊敬的曹老师请教!1.The cup of water
becomes more and more clear.问题:这个句子为什么不可以用一般现在时呢?一般现在时的使用要满足哪些条件呢?2.He has written a report.问题:请教曹老师,written为过去分词;过去分词既表被动又表...
even和even though均可引导状语从句,表示让步,它们有何区别吗?还有,它们与even if有哪些区别?比如下面三句的区别在哪里?They’ll stand by you even you don’t succeed. They’ll stand by you even though you don’t succeed. They’ll stand by ...