they'll
- 1Contraction of they will.
They'll announce the winners after the final round.
Once the road reopens, they'll resume the bus service.
Note
The apostrophe stands in for the dropped letters of will. The result is at home in speech and informal writing, while careful formal prose usually spells out they will. The pronoun inside keeps its full range. It can mean a group already mentioned, a single person whose gender goes unstated, people in general, or the vague authorities of "they'll never allow it."
- 2Contraction of they shall.
Under the agreement, they'll surrender the property by month's end.
The treaty says they'll withdraw all troops within thirty days.
Note
Spelling cannot separate this reading from the everyday "they will" contraction. The letters are identical, and only context decides. Shall with a third-person subject tends to carry obligation rather than simple prediction, so this reading is the rarer one. It surfaces mostly in legal, contractual or otherwise formal settings, where "they'll surrender the property" means they are bound to, not merely expected to.
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