Please help me settle a dispute.
"She floats on past." or "She floats on passed".
If you can substitute the word by, then use the spelling past:
Ex: She floats on by.
Ex: She floats on past.
Source: Confusing Words--Past, Passed - Learning Activity
verb: I passed my English test.
participle: I have passed my English test.
noun: Tell me about your past.
adjective: What's your past history?
adverb: The log floated on past/by.
preposition: When I got home, it was past midnight.
Does that help?