求助英语好的同学!我找不到主语等各成分是什么...

题目

求助英语好的同学!我找不到主语等各成分是什么...
1,in reaction to the backward discharge of bullets,the gun,and hence the boat,move forwards.
2,cylindrical in shape,made of wood,and hanging from string,it was moved to and fro bu steam blowing out from samll exhaust ports at either end.
第二句打错了 应该是by～cylindrical in shape,made of wood,and hanging from string,it was moved to and fro by steam blowing out from samll exhaust ports at either end.

答案

1,in reaction to the backward discharge of bullets,状语.the gun,and hence the boat,主语 move谓语 forwards.状语
2.by～cylindrical in shape,made of wood,and hanging from string都是状语,it 是主语was moved是谓语 to and fro by steam blowing out from samll exhaust ports at either end.都是状语