By 2000,coal had become the fuel for more than 75% of electricity produced and only hydro continued to be another significant source suppling approximately 20%.这句话中的supply为什么要改成supplying?这句话是过去时阿是不是 如果

By 2000,coal had become the fuel for more than 75% of electricity produced and only hydro continued to be another significant source suppling approximately 20%.这句话中的supply为什么要改成supplying?这句话是过去时阿是不是 如果
By 2000,coal had become the fuel for more than 75% of electricity produced and only hydro continued to be another significant source suppling approximately 20%.
这句话中的supply为什么要改成supplying?这句话是过去时阿
是不是 如果我不用 significant source supplying approximately 20%这个句型的话 我就要把这句话改成significant source which supplied approximately 20%?

By 2000,coal had become the fuel for more than 75% of electricity produced and only hydro continued to be another significant source suppling approximately 20%.这句话中的supply为什么要改成supplying?这句话是过去时阿是不是 如果
如果你要改成后面的那句的话,当把which去掉的话,supplied就应该变成suppling.就和原文中是一样的了.
这是一个固定的语法,举例说明：如果是.which is regarded as.,当句中同时有关系代词和be动词时,将二者同时去掉,动词regarded保持不变.而当句中无be动词时,就像你的这句话,则要把该动词变成-ing形式.不过如果是完成时的话,就不能改,which就不能省略,这里涉及到句子时态语境的问题.
希望对你有所帮助哦.
.

suppling approximately 20%是修饰前面的source。
你要分清楚谓语和非谓语动词
only hydro continued to be another significant source suppling approximately 20%这个句子里，谓语动词是 continued， 所以supply就只能作为非谓语动词。非谓语的形式有不定时，现在分词，...

全部展开

suppling approximately 20%是修饰前面的source。
你要分清楚谓语和非谓语动词
only hydro continued to be another significant source suppling approximately 20%这个句子里，谓语动词是 continued， 所以supply就只能作为非谓语动词。非谓语的形式有不定时，现在分词，动名词和过去分词四种。这里应该选择现在分词。
如果加上which， which supplied approximately 20%这个句子就是一个定语从句，这时候，supply就做谓语动词。记住，只有谓语动词才有时态的变化。

收起