Question

请英语高手帮忙分析句子成分

1、tropical diseases would almost certainly spread northwards,causing wider-ranging and mostly adverse impacts on human health,with significant loss of life.with是作什么成分，与哪个句子连接的。
2、It may be that we can adapt to it without difficulty.这是什么从句
3、it is difficult to get people to act when predictions may take between 50 and 100 years to materialize.状语从句中的主谓宾是什么，between...and... 作什么成分，to materialize 是补语吗
4、if preventive action is going to work "you really do have everyone on board".请分析这个句子，尤其是引号中的句子成分。

Answer 1

1.with复合结构 做状语 修饰整个句子，这个句子是 主谓结构
（tropical diseases）主 would almost certainly （spread）谓 northwards状,causing wider-ranging and mostly adverse impacts on human health,with significant loss of life【causing （wider-ranging and mostly adverse）定语 impacts causing 这部分做状语】

2.表演从句 that引导的
3.between and 作定语
4.主谓宾结构 其中的do是强调动词have的没有确切含义