阅读下列句子并体会黑体部分的用法
1．By the time it ended, more than 700 people had been killed and 2,700 had been injured.
2．By the late 1890s, he had moved to Galveston, where he died in 1899, a year before the hurricane struck.
3．Coghlan traveled back to Canada－after he had been buried in Texas!
