when did you start skating?a,since i was five b since five years ago c when i was six d for six years选哪个,为什么?

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when did you start skating?a,since i was five b since five years ago c when i was six d for six years选哪个,为什么?

when did you start skating?a,since i was five b since five years ago c when i was six d for six years选哪个,为什么?
when did you start skating?
a,since i was five b since five years ago
c when i was six d for six years
选哪个,为什么?

when did you start skating?a,since i was five b since five years ago c when i was six d for six years选哪个,为什么?
C
A 如果用Since 则主句应用完成时 这儿是过去时
B 五年前不用Since搭配 直接说 five years ago 就可以了
D 答非所问 问的是什么时候开始的 答的是有六年了 不符合逻辑

c when i was six
WHEN (DID) YOU...., SO WHEN i (WAS) SIX

c, 问题是问具体时间。所以答案只有C是具体的过去时间，其它都是与完成时搭配用的

C
when提问时问具体的时间点，所以用C 六岁时

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