一、
1、Half an hour had gone by, but the last bus hadn't come. We had to walk home.
第一句主干是末班车还没来。第二句主干是 我们只好走回家。半个小时已经过去，并且描述的是过去的事，所以用过去完成时“had done”,剩余部分用过去时态。
2、Mary seemed to be worried about the Chinese exam, because she hadn't learned texts by heart. 主干是玛丽对汉语考试担心。看上去是seem to be,对某事熟悉是learn……by heart 没通过考试发生在过去，原因是在过去的过去用过去完成时。
3、Now that the basketball match has been postponed, we might as well visit the museum.
主干为我们去参观博物馆。"now that" 引导原因状语从句，篮球赛已被推迟用现在完成时，后半句语态用一般过去时
4、He lived in Australia with parents all the way during the World War ||.
主干是他和父母住在澳大利亚。“住在某地”用live in+地点。“在……期间”用during，句中谓语动词为一般过去时/现在完成时
5、You could say that I have kind of lost touch with my classmates since I gratuated from Nanjing University in 1985.
主干是我和同学失去联系。“自从……以来”用ever since引导时间状语从句，主句用现在完成时，从句用一般过去时。
二、1、I always intended to write to them，but something or other came up. It seemed that I was busy .
主干：我打算写信，可总有事，我抽不出空。打算做某事：intend to do sth 不定式表示经常性的动作并能坚持下来。给某人写信：write to sb然后补充剩余部分。全句时态为一般过去时
2、But I missed them all the time, they are on my mind. I must make efforts to keep up correspondence.
主干是我努力和他们保持联系。一直挂在心头：on one''s mind. 努力做某事：make efforts to do sth. keep up 跟上；和……保持联系 一直all the time/all the way
护理八班 王鑫 2019109234
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