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You can return the TV as long as you return it within 30 days after you buy/bought it.

Which is the right tense in this sentence?
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New2grammar
You can return the TV as long as you return it within 30 days after you buy/bought it.

Which is the right tense in this sentence?

bought
What is the reason for this sudden tense switch? Please help as this is something new to me.
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after you bought it -- this is the only correct version, sorry
If you move or change schools after you submit your application, you must notify


...

So. why does this sentence use 'submit' instead of 'submitted'? The logic of this sentence is the same as the previous sentence, except this one uses the present tense. X happens after Y.
New2grammar
If you move or change schools after you submit your application, you must notify


...

So. why does this sentence use 'submit' instead of 'submitted'? The logic of this sentence is the same as the previous sentence, except this one uses the present tense. X happens after Y.

Why are you asking it if you know it better? Emotion: smile

Yes, both are correct and mean the same.

BTW, tense simplification.
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The more natural way of expressing this would be:

You can return the TV within 30 days of purchase

You can return the TV within 30 days of buying it
Thanks for the explanations but I still can't distinguish when to use past or simple tense.

The reason I asked was because I couldn't tell when to use which in the presence of 'after'. Could someone please explain to me what information you use to decide the right tense to use. Basically, if I simply use past tense following the word 'after', I will get a lot of grammatical errors.

I think this topic is trivial to most of you but for me this is really difficult. Please bear with me.

Thanks
Sorry, I missed out your post. Incho, are you saying that it is always safe to use past tense following 'after'?

'He can work part-time after he retired'. conveys the same meaning as 'He can work part-time after he retires'
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