①第一句的主干是末班车没有来，半个小时过去了作时间状语。第二句主干我们回家，走路作为方式状语。
After half hour going by, the last bus had not come. We had to go home by walking.
②主干是玛丽看上去是担心的，因为她没有背熟课文。
Marry looked like worried about the Chinese exam because she did not learn articles by heart.
③主干是篮球赛被推迟，我们参观博物馆。不妨（might as well）
Since the basketball game had been postponed, we might as well visit museum.
④主干他和他的父母住在澳大利亚。
His parents and he lived in Australia all the way during the Second World War.
⑤主干我失去了联系与我的大学同学。（kind of 为副词）
Since graduating from Nanjing University in 1985, I have kind of lost touch with my university classmates.
