我們知道,動詞的非謂語形式有三種：不定式、v-ing形式和v-ed形式.非謂語的邏輯主語,也就是在邏輯上存在的關(guān)系.它不像動詞作謂語時,主語和動詞存在主動或被動.
1.不定式.如：It is very hard for us to learn English well in a short time.此句中,to learn English well是主語,us 是動詞不定式的邏輯上的主語.（是"我們"學(xué)習(xí)英語)
2.v-ing.如：His being late again made the teacher very angry.
又遲到了是他(his).
Arriving at a strange-looking house,he showed me into a large ,bright,clean room.來到的人是他（he)
一般來說,作狀語的非謂語動詞的邏輯主語就是句子的主語.
3.v-ed形式.如：Astonished at the amount of work in the new timetable,Lucy decided to leave her job immediately.
驚訝的人是Lucy,也就是說astonished 的邏輯主語是Lucy.