Theyve
They've is the contracted form of they have, used as an auxiliary in perfect tenses with the pronoun they. In standard orthography, it is written as they’ve, with an apostrophe indicating the omitted letters from have.
Usage extends to both plural and singular uses of they. It appears in present perfect constructions such
Distinctions with other contractions are important. They’ve represents have, not would or had. For those meanings,
Style and formality notes indicate that contractions like they’ve are common in everyday writing and journalism,
Orthography and origin: the contraction arose in Early Modern English as patterns of contraction became standard.