they'll
pron.pron. the short way to say 'they will' or 'they shall'. You use it to talk about what a group of people or things is going to do in the future.
pron. a contraction of the third-person plural pronoun 'they' and the auxiliary verb 'will' or 'shall'. Used to indicate future tense or intent.
They'll arrive at the party around eight o'clock.
If the weather stays clear, they'll finish the roof repairs by the end of the week.
While the board members seem hesitant now, it is expected that they'll eventually reach a consensus once the final financial reports are presented.
A contraction used in speech and informal writing; in formal academic contexts, the full form 'they will' is preferred.
they're willthey'llLearners sometimes confuse the contraction for 'they are' with the contraction for 'they will'.