名词做同位语时需加逗号么But now it is realized that supplies of some of them are limited,and it is even possible to give a reasonable estimate of their “expectation of life”,the time it will take to exhaust all known sources and reser
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名词做同位语时需加逗号么But now it is realized that supplies of some of them are limited,and it is even possible to give a reasonable estimate of their “expectation of life”,the time it will take to exhaust all known sources and reser
名词做同位语时需加逗号么
But now it is realized that supplies of some of them are limited,and it is even possible to give a reasonable estimate of their “expectation of life”,the time it will take to exhaust all known sources and reserves of these materials.
名词做同位语时前面需加逗号么 怎么有的句子没有加,而有的却加了逗号?如这个句子 the time 前面加了都好的
名词做同位语时需加逗号么But now it is realized that supplies of some of them are limited,and it is even possible to give a reasonable estimate of their “expectation of life”,the time it will take to exhaust all known sources and reser
同位语前的逗号可加可不加,其实没有多大规则,举个例子,Our teacher, professor Wu, has been to America. (我们的老师吴教授去过美国.)同时Our teacher professor Wu has been to America.也是可以的.如果非要说有什么规则,倒是有个惯例,如果同位语很长,那一般加逗号,例：Helen falls in love with Jack, a son of an artist.（海伦爱上了艺术家的儿子杰克.）
一定要加啊，这个句子中只有这一个同位语
望采纳，不明白继续交流是否单个名词做同位语时不加，而当名词有修饰语才加逗号呢 ？ http://zhidao.baidu.com/question/301174352.html 不过从提问中的提问中那句话似乎也是书上说的，那么就很明显 each 此时是做代词的，和名词不是一样么 ？each不叫同位语，那是定语。同位语必须是前面的等于后面的那个...
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一定要加啊，这个句子中只有这一个同位语
望采纳，不明白继续交流
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无论是名词作同位语还是同位语从句，它们在意义上等同于前一名词（这一点也是名词作同位语与名词作定语的本质区别，比如an apple tree）；而在功能上它们起着强调解释前一名词的作用。所以如果这个强调解释部分只是几个单词，一般不加，比如：木匠鼻祖鲁班。如果这个同位语很长，想要把前面的名词解释的透彻，还是需要加上的。比如你的例句里面，the time既是前面引号部分的同位语，又充当它后面定语从句里面...
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无论是名词作同位语还是同位语从句，它们在意义上等同于前一名词（这一点也是名词作同位语与名词作定语的本质区别，比如an apple tree）；而在功能上它们起着强调解释前一名词的作用。所以如果这个强调解释部分只是几个单词，一般不加，比如：木匠鼻祖鲁班。如果这个同位语很长，想要把前面的名词解释的透彻，还是需要加上的。比如你的例句里面，the time既是前面引号部分的同位语，又充当它后面定语从句里面的宾语，这时候如果不隔开，你觉得合理吗？
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