独立主格结
一、独立主格结构的构成形式1、逻辑主语+V-ing这种构成形式内部的逻辑主语是分词的动作执行者，分词表示的动作不是整句主语发出的动作，而是其逻辑
A
2)_______no bus, we had to walk home.   A.As there being  B.As there was     C.Being   D.There was3)_______Sunday, the library doesn't open.    A.Being    B.There being      C.It being   D.Having been4)______Sunday, the library doesn't open.A.As it being  B.Being  C.It is  D.As it is 　
B
C
D