many years ago ,Jane ________ in the flat with her grandma f

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many years ago ,Jane ________ in the flat with her grandma for a long period of time
A.had been living
B.lived
既然有for a long period of time,为什么不能选A,表示在这一段时间·····这一意思呢?有for出现也可以用一般现在时吗?详解,谢啊!
答：因为句子中有明显的表示过去时间的时间状语：many years ago,表示的是过去某段时间内发生的情况,所以用一般过去时,而不用过去完成时.
for+一段时间,不仅可以用于完成时态,也可以用于一般时态.它表示某个延续性的动作或状态持续的时间长度.如：Thomas Edison(1847-1931）was the world leading inventor for sixty years.就是来自高中教材的一个句子.自这个句子出现后,for 加一段时间与一般过去时连用的考题成了某些考官的最爱,如：北师大版高一unit 2 lesson 1 练习_试卷_备课_当知网
It is said in the book that Thomas Edison (1847-1931) _____ the world leading
inventor for sixty years.A.would be B.has been C.had been D.was
这题相信选BC的不在少数,然而“正确”的答案一定是D!因为,选B,则表示爱迪生还活着,且当仍是当今世界上处于领先地位的发明家,与事实不符.选C,则应有一过去的时间作参照,表示到那个时间为止,他领军世界发明已经有40年了,但句子中并没有提供这个时间.如果将主句改为it was said in 1931 that.则C正确.
楼主这题与这题是同一类型,但更有迷惑性!
因为句子中有一个过去的时间状语：many years ago,而A是过去完成进行时!
要注意的是：many years ago 与many years before 的区别!ago是从现在算起的“以前”,before通常是以过去某个特定的时间算起的“以前”.如用A,则句子中还是缺少了一个作为参照的过去时间,如改为：Before she moved to the city (/went abroad,etc),Jane had been living in the flat with her grandmother for a long period of time.就对了.当然,如改为many years before .,也可以,只是many years 与a long period of time 重复了!

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