Student or Learner
'I hastily stuffed everything in my bagpack and ran out of my house as otherwise I would have been late for bus.'
or should I say '[...] as otherwise I would be late for bus?'
I opt for the first one but not sure though.
Best regards, Tomasz.
Welcome to the forum, Tomasz.
Say either bag or backpack — not bagpack. You need 'the before 'bus'.
'...I would have been late' is fine.