Crossing the Domain伴随状语,逻辑主语是he
he主语
sat down谓语,也可以把down再拆成状语,不过没必要
suddenly 方式状语
on a bench地点状语
unnerved by the thought 过去分词短语又是一个伴随状语,为这个想法感到焦虑
of the missus sitting up for him介词结构作thought的后置定语,其中sitting up for him是现在分词短语做missus的后置定语,和被修饰词missus是逻辑主谓关系,“正在焦急等待他的那个妇人”
waiting to learn the outcome of the fight,独立主格结构,逻辑主语是the missus
这个句子非谓语动词的使用有点多,句子质量较高,但看起来麻烦,我给你拆成简单句
He crossed the Domain,他穿过the Domain（地名）
and he sat down suddenly on a bench.突然一屁股坐在长凳上
He was unnerved by the thought of the missus.想到家里的太太,他觉得很焦虑
The missus was sitting up for him,太太一直在等着他
and the missus was waiting to learn the outcome of the fight.太太正焦急地等着战斗的结果
看下每个动词的主语应该就能懂了,楼主,我去把原文找来看了一遍,才能确定.