为什么I had worked in a car factory for two years before I came

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/30 20:35:06

为什么I had worked in a car factory for two years before I came here.用现在完成时而The famous scientists has returned home.He stayed in Africa for 13 years.后半句不用过去完成时?

1.I had worked in a car factory for two years before I came here
句意是：我在来这儿之前已经在一家汽车工厂工作了两年.
本句中before 引导的时间状语从句是一般过去时,“我在一家汽车工厂工作了两年”是发生在“来这儿之前”,即“过去的过去”,所以用过去完成时.
2.The famous scientist has returned home.He stayed in Africa for 13 years.
本句句意是：这位著名的科学家已经回家了.他在非洲待了13年.
句子只是强调“他在非洲待了13年”这一动作.如果两句合为一句,动词形式就需要变化了.
The famous scientist had stayed in Africa for 13 years before he returned home.
意思是：这位著名的科学家回家之前在非洲待了13年.
即“在非洲待了13年”发生在“回家（过去的动作）”之前,属于过去的过去,这时需要用过去完成时.

为什么I had worked in a car factory for two years before I came Beijing,I,had,before,lived,in,ten,came,years,I,here,for连词成句 I came to the city two years ago.I've worked here for n___ t I HAD WORKED HERE FOR 3 YEARS Last year ,I left Beijing.I had worked there for two years.用 Kat worked in administration for many years Kat had worked i Has Mr LI worked in this factory for 35 years?--Yes,he has.I I worked in Shanghai for three years I worked in factory for 10 years这句话语法有错吗?如果没错,该怎么翻译? The boss_____company i worked in two years ago has____in sol It's two years since I worked in Beijing.为什么不能用has worke They worked in a hospital two years.写问答 I exercised with my