这2个句子哪个对啊，关于but it also 及 but also it
Not only does the sun give us light but also it gives us heat.Not only does the sun give us light, but it also gives us warmth.请问:(1)but 前面加不加逗号;（2）but it also 及 but also it 有区别吗？写作文时哪个正确? 回答：上面的两个句子都对。1）not only … but also 中的 not only 不能分开使用，但 but also 却可以分开使用。例如： The area was not only hit by an unexpected heavy rain，but some bridges were also
washed away.因此你提问的 but it also 及 but also it 是没有区别的，写作文时两个都正确。
2）not only … but also 连接两个并列成分时，可以省略 but 或 also ，也可以把 but also 都省略掉。例如：I not only heard it but (also ) saw it. He was not only compelled to stay at home, (but) also forbidden to see his friend. She not only finished the task ahead of time, (but also ) she came to help us. 3) not only..but also..的变体形式有以下几种：not only..but..not only..also..not only..but..as wellnot only.. 4）but 的前面加不加逗号?not only 与 but also 之后所连接的若是名词、代词或短语等时，一般不用逗号；若其后所连接的是分句或
较长的结构，一般使用逗号将其分隔开来，避免使句子显得过于冗长。 你对于英语某些短语的用法问得很细，说明你的学习已达到很不错的水平，希望你多多阅读有关的英语语法专
著，不可听信随意的编造或猜测。
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http://zhidao.baidu.com/question/104129742.htmlhttp://iask.sina.com.cn/b/4432050.html