.时态详解：过去将来完成进行时一、过去将来完成进行时的用法过去将来完成进行时表动作从过去某一时间开始一直延续到过去将来某一时间。动作是否继续下去，由上下文决定。如：I heard by July youd have been teaching here for ten years.我听说到七月份，你就在这里教了10年书了。二、过去将来完成进行时的构成过去完成进行时由“would have been+现在分词”构成。如：He said that by the end of the spring term he would have been studying English for three years.他说到了春季学期末，他就学了三年英语了。I knew by that time he would have been working there for 30 years.我知道到那时他他就在那儿工作满30年了。She told me shed have been teaching in that university for 20
