（ ） such heavy loss,the businessman didn't have the courage to go on.1.Having suffered2.Suffering 3.To suffer4.Suffered分词的动作或状态分词的动作或状态先于主句谓语动词发生时,
问题描述：
（ ） such heavy loss,the businessman didn't have the courage to go on.
1.Having suffered
2.Suffering
3.To suffer
4.Suffered
分词的动作或状态分词的动作或状态先于主句谓语动词发生时,
答
Having suffered
因为此动作发生在主句之前
答
1.
答
1
首先,逻辑主语和动词supffer是主动的关系,所以用现在分词DOING,3.4排除.
第二,分词和谓语动词有先后顺序,(先完成分词的动作,再完成谓语动词的动作),所以选项1,用现在分词的完成式
答
1.过去完成进行时做原因状语。