1.Half an hour has went by,but the last bus have not come yet.We only went home on foot. 先找主语主语1末班车没来。2我们回家。时态采用现在完成时（标志词是yet)还和过去时
2.Mary seems to be very worried about the Chinese exam because she has not learned the tests by heart. 找主语 玛丽对汉语考试很担心。 时态 采用一般现在时。 对...感到担心用be worried about，熟悉用learn....by heart
3.Now that the basketball gome has been pastpone,we can go to the museum. 找主语 我们去图书馆 时态 采用一般现在时（当成正在谈话）
4.During the Word War ll,he has lived in Australia all the way with his parents. 找主语 他住在澳大利亚 用During 引导时间壮语。 时态 现在完成时
5.Since l graduated fome Nanjing University in1985,it can be said that l have kind of lost tauch with my college classmate. 找主语 我与我的大学同学失去联系 时态采用 过去时，现在完成时。since引导的句子，从过去主一般现在时。从....毕业graduat fome
