英语语法精讲-逻辑主语
逻辑主语：是非谓语动词动作的执行者或承受者;它们在逻辑上存在着主谓关系或动宾关系，但不能直接作非谓语动词的主语，因此叫逻辑主语。逻辑主语的判断：
1. 句子主语就是非谓语动词的逻辑主语，它们之间是逻辑上的主谓关系或动宾关系。例如：
She likes helping others .(she 就是 helping 的逻辑主语)
Moved by my words, her father told me the truth. (her father 是 moved
的逻辑主语)
2. 介词of 或for的宾语就是非谓语动词的逻辑主语。例如：
It”s kind of you to tell me the news . (you 是to tell 的逻辑主语)
这个句子中，it是形式主语，句子的真正主语是to tell me the news.
It is impossible for you to finish so much work in so short a time . (you
是to finish 的逻辑主语)
3. 复合结构中的宾语就是非谓动词的逻辑主语。例如：
The doctor asked me to answer her question. (me 是to answer 的逻辑主语)
I saw him playing at the river side. (him 是playing 的逻辑主语)
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