...g VLF emissions is lightning, which generates a pulse of radio waves every time it flashes这句话主语是main source. of...是修饰成分 那么,occuring VLF emission 这个属于动名词短语吗为什么有的动名词可以独立做成分 比如Swimming is my hobby有的动名...
Sometimes I think how grateful I would be today if I had learned more back then about what really matters. back then=at that time。back是形容词,then是名词吗?把back then放到句尾会有歧义吗?
各位老师们,请问:Whether we can have clean
drinking water lies in what effective measures will be taken by the
government about water pollution. 句中的what成分如何分析?what是可以做限定词修饰名词吗?和what time is it?类似,有没有相关的语法点?
...也用 real 吗?第二句,why do you say that?英语书上电话对话中的,怎么不用did, 因为整段对话中都是用的过去式.I hear it's often foggy,这是否应该也用过去多?第三句,fill in the blanks withe words in the brackets. make new sentences withe t...