1. ➀句子主干：我们走回家➁句子之间的关系：因为半个小时过去了但末班车还没来所以我们只好走回家（大体为因果关系 但前面因为……部分为转折关系）➂主要词汇或短语：half an hour 半小时 last bus 末班车 go home 回家 go by 过去了➃翻译：Half an hour went by,but the last bus has not come,so we have to go home on foot
2. ➀句子主干：玛丽对考试很担心➁句子之间的关系：因为玛丽还没有背熟课文所以玛丽对汉语考试很担心（因果关系 ）➂主要词汇或短语：be worried about对……担心learn …by heart记熟 ➃翻译：Mary seems to be very worried about the Chinese exam because she has not learned texts by heart
3.➀句子主干：我们去参观博物馆➁句子之间的关系：（可以看成因果关系 ）因为篮球赛已被推迟所以我们不妨去参观博物馆➂主要词汇或短语：may as well 不妨说postpone 推迟➃翻译：Since the basketball match has been postponed,we might as well to visit museum
4.➀句子主干：他和父母住在澳大利亚➁句子之间的关系：时间状语从句➂主要词汇或短语：all the way 一直 the second world war二次世界大战➃翻译：He and his parents lived in Australia all the way during the second world war
5.➀句子主干：我与我的大学同学失去联系➁句子之间的关系：时间状语从句➂主要词汇或短语：lose touch失去联系 ➃翻译：Since I graduated from the NanJing University in 1985,I have kind of lost touch with my college classmates
