that've
Those which have
That've is a contraction of "that have," used when that functions as a relative pronoun: the only books that've survived, things that've changed since then.
It appears mainly in speech and informal writing.
In formal contexts, writers typically spell out "that have."
who've
Contraction of who have
- could'vePast possibility contraction
- would'veContracted conditional auxiliary
- should'vePast obligation unfulfilled
might've · must've · they've · we've · you've · I've · shortened · informal · spoken · colloquial
- that's itExpression signaling completion
- that's enoughDemand to cease
- that's allStatement of conclusion
- that's whyExplains the cause
- that's rightAgreement confirming correctness
- that's lifeResigned acceptance of circumstances