kaikei ga owattara, mochikaeri no piza o uketorimasu

direct object particle

Breakdown of kaikei ga owattara, mochikaeri no piza o uketorimasu

• が: subject particle
• の: possessive case particle
• 〜たら: conditional form

Questions & Answers about kaikei ga owattara, mochikaeri no piza o uketorimasu

Why is が used after 会計 in 会計が終わったら?

Because 終わる is an intransitive verb: it means to end / to be finished, not to finish something.

So in Japanese, the thing that ends is marked with が:

• 会計が終わる = the payment/check-out ends
• not 会計を終わる

If you wanted a transitive version, you would use a verb like 終える:

• 会計を終えたら = after finishing the payment

So 会計が終わったら literally feels like when the payment is finished.

What exactly does 終わったら mean?

終わったら is:

• 終わった = past/plain form of 終わる
• ら = the conditional part of 〜たら

Together, 〜たら often means:

• when ...
• after ...
• if ...

In this sentence, it means when/after the payment is finished.

So:

• 会計が終わったら、... = When the payment is done, ...

Here it is not a hypothetical if so much as a sequence: first the payment finishes, then the pizza is picked up.