请问：请帮忙分析一下这句英文的语法结构,a small fishing boat was carried miles out to sea by the powerful fish as it pulled on the line.我知道这是个被动语态,主要弄不懂as it pulled on hte line是什么结构.这是新概念2册第82课中的一句.
问题描述：
请问：请帮忙分析一下这句英文的语法结构,
a small fishing boat was carried miles out to sea by the powerful fish as it pulled on the line.我知道这是个被动语态,主要弄不懂as it pulled on hte line是什么结构.
这是新概念2册第82课中的一句.
答
1.该句的主要成分是
A boat was carried miles out to sea.
一只船被拖出大海数英里远..
2.by the powerful fish （被那只强有力的鱼）是施事者,也就是行为者.
3.as it pulled on the line 中：
as 是连词（当...时）,引导时间状语；
it 指的是 boat；
动词 pull 是不及物动词,“被拖拉”的意思；
on the line 处于危险中
所以as it pulled on the line 就是：当那只船被拖拉的危险之中的时候.