you have learned spanish ,you will find italian much easier 这个题 答案选once 为什么不选when?

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you have learned spanish ,you will find italian much easier 这个题 答案选once 为什么不选when?
you have learned spanish ,you will find italian much easier 这个题 答案选once 为什么不选when?

you have learned spanish ,you will find italian much easier 这个题 答案选once 为什么不选when?
这句话说的是条件,一旦...,而不是当...时候,侧重点不同.
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once是“一旦”，表条件；而when是“当...的时候”，表时间。两个句子之间存在条件关系。

once一旦

仿佛 是因为 have learned 是现在完成时 所以应该不能解释“when 当”

因为这里带有条件意味。“一旦”我知道选once是一旦，根据句子，但是when不是也可以吗？ when为什么不选？只能说将就。尽管有时when 也可表条件，但没法表达”一。。。就。。。“ 这一时间的紧接关系， 而once 两者兼而有之。 单选时，得考虑最佳选项。 选once 不意味when 错了。 OK？ ：）...

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因为这里带有条件意味。“一旦”

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