__ he was a boy,Pele had a dream.为什么填Ever since 能填 while 有什么

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__ he was a boy,Pele had a dream.为什么填Ever since 能填 while 有什么区别?如果填 ever since
是否应该改成 Ever since he was a boy,Pele had had a dream.为什么?

应该是：
1 When he was a boy,Pele had a dream.------when搭配“一般过去时”.
2 Ever since he was a boy,Pele has had a dream.-------有 since 的参与,你必须用“现在完成时”.
3 While he was a boy,Pele had a dream.----- when搭配"一般过去时".
4 He SAID that he HAD HAD a dream SINCE boyhood.-------主句that 句子（since +过去完成时）
5 在你的语境中,when和while的使用没有区别.

__ he was a boy,Pele had a dream.为什么填Ever since 能填 while 有什么 an old man __ the accident __ while he was __ __.该填什么? I______him ever since he was a child.A.have known B.had know I ___li lei since he was a little boy A had konwn B have kno You __ a good boy,中间填什么? the boy to school he was nine years old .的地方填什么a went,until Pele became a ___ soccer star when he was fifteen. my dream is------(be) a scientist该填什么?为什么 he is a good friends of __(she). 填什么?为什么? Jack said he knew__about the matter.__上为什么不能填a few而填little? ___he was still very young.A.When B.At C.For D.Since为什么这样填 He _____(dream)of being a pilot since he was a child