He spent three years doing one experiment after another,_ to find out a cure for cancer我想知道为什么空中填determined 为什么是ed形式 老师说是动词形容词化了可我还是不懂最好能举几个例子还有说清相关语法

He （ ）the first three years of his life in hospital A.spent B.cost 为什么He （ ）the first three years of his life in hospitalA.spent B.cost为什么 This is the school in which I spent three years.This is the school where I spent three years.相同 He studied at that place where he spent three years.老师说是状语从句,对不起阿 句子发错了 应该是I study at this place where I spend three years.l still remember this place where l spent three years.老师说第二个是定语从句 They spent three years building the railway.（同义句转换）It_____them three years_____ ______the railway. We spent three years building the highrise=It __ __three years to build the highrise he spent three days finishing the work同义词转换 英语翻译He spent three hours walking through the forest 还是：He spent three hours walking through the forest on foot It was three years before he came He spent two w____ years writing the book. He stopped smoking for three years的同义句 He ____ ____ smoking for three years 这句话怎么办?其中which 可不可以用that 替代?Dr.Clark spent three years in the National Library during which time he collected most of the data he needed for his new book. 1.He spent three years finishing his work.(改为同义句) It __________ _________ three years _______ ______his work.2.He made few friend there.（完全反意疑问句）He made few friend there,_________ _______?翻译：1.对于小孩来说,单 the workers spent three years ___ this bride 用build.tobuild .building built 哪个 lucy spent three years ______Chinese before she came to China 为什么填learning 求解释 He said he ____(go) to Beijing three years ago. The first three years of his life ________ in the hospital .A.spent B.was spent C.were spent应选哪一项 he worked here three years ago用since three years ago改写句子 three years