Sorry, what’s the difference between Vたら and 時?
For example, we say:
両親が将来を考えたら、大学を出なければならないと言いました。
But we don’t say:
両親が将来を考える時、大学を出なければならないと言いました。

Someone can explain this for me? とても難しいと思う!

Question

Sorry, what’s the difference between Vたら and 時? 
For example, we say:
両親が将来を考えたら、大学を出なければならないと言いました。
But we don’t say:
両親が将来を考える時、大学を出なければならないと言いました。
 
Someone can explain this for me? とても難しいと思う!

Answer

Yeah it sounds confusing. I'm not a professional teacher but the second one sounds a bit off for me. In that context, you can think たら is "if" and とき is "when", so two conversations can be translated in into:

1. Parents said "if you think about your future..."
2. Parents said "when you think about your future..."

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