He reports that, when speaking, white communicators usually look away from the listener, only periodically glancing at them. They do the opposite when listening.They are expected to look at the speaker all the time.
请问这三处为什么用动名词形式? 如果是when是介词后面必须用动名词,那periodically后面为什么用动名词呢?when和listening之间有没有省略什么?谢谢老师!
首先非常赞同刘老师观点“提问网友的语法真是非常需要恶补一下了”
He reports that, when(they are省略了) speaking, white communicators usually look away from the listener, only periodically glancing at them. They do the opposite when(they are省略) listening.They are expected to look at the speaker all the time.
解答如下:
A:when是一个连词,不是介词,后面无法接动名词,只有介词才能接动名词doing
(1)when doing(错误,因为when是连词)
(2)before doing(正确,因为before是介词)
(3)after doing (正确,因为after是介词)
B:when speaking和when listening是一个保留连词的现在分词作时间状语,补充完整为“when they are speaking”“when they are listening”
C:glancing at them为现在分词作伴随状语。
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从网友的提问看,有太多的英语语法空白。
1. 三个doing 都是现在分词,不是动名词。不知网友缘何称其为动名词?
2. when 从来就是连词,为什么叫介词呢?
3. 英语在一些连词后,经常省略主语和be 动词,这是英语的基本常识。看来,网友需要补上这一课。可参考:http://www.yygrammar.com/Article/201501/3815.html
4. only periodically glancing at them:只是偶尔瞥他们一眼。这是现在分词短语作伴随状语,伴随前文look away...
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