系动词的位置

系动词后面的一定是表语，那么请问主系表结构，是不是表示系动词一定要跟在主语后面？

下面两个句子的keep和appear是系动词吧？但不是紧跟主语后面，这是主系表结构吗？是补充说明主语吗？

I asked them to keep quiet.

I tried to appear resigned to defeat.

I asked them to keep quiet.

I tried to appear resigned to defeat.

这是两个概念。黑体部分叫做动词不定式，而这个动词不定式是由系表结构组成。不定式本身的结构也是各式各样。例如，有的不定式是不及物动词；有的不定式是不及物动词加状语；有的不定式是及物动词加宾语；有的不定式是及物动词加复合宾语，等等，不一而足。例如：

I asked him to help.

I asked him to help as soon as possible.

I asked him to help us.

I asked him to help us clean the window.

刘永科 - 教育出版集团英语总顾问 & 英语系列图书主编

擅长：语法理论,语言学,文化背景 | 采纳率 86% | 回答于 2021-08-16 12:14

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