In this way self-confidence grows, first from mastering a subject, then from being able to talk about it.
这样,你自信心不断增强,先是因为掌握了一门学问,接下来是因为能够就此发表见解。
——《新概念英语》
介词短语也可以作表语啊,这里的介词短语“from mastering a subject”和“from being able to talk about it”为什么不能作表语?
这句话中 grow 是实义动词,不是系动词。
系动词后面一定有表语,表语可由形容词、名词等充当。像下面句子中的 grow 就是系动词:
As time went on he grew more and more impatient.
(时间久了,他越来越没有耐心。)
The skies grew dark and it began to rain.
(天渐渐黑了,又下起雨来。)
本句中 grow 后面没有相关成分,因此它是不及物动词,按照实义动词、系动词等分类则属于实义动词。
您好,但是介词短语也可以作表语啊,这里的介词短语“from mastering a subject”和“from being able to talk about it”为什么不能作表语?
追答从句义来看,from mastering a subject 和 from being able to talk about it 作状语。
再如:
Do all plants grow from seeds? 所有的植物都是从种子长成的吗?
The problem simply resulted from a difference of opinion. 这个问题仅仅是由于意见分歧引起的。
这两句话中 from seeds 和 from a difference of opinion 都是状语。
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