they'll

They’ll is a contraction of they will. Like other contractions, it’s primarily used in informal speech and writing.

They’ll can be used in all the contexts in which they is used by itself, including in reference to multiple people or to a single individual.

Plural example: They said they’ll deliver the package immediately after they receive it.

Singular example: Whoever the winner is, they’ll be getting a lot of attention after their identity is revealed.

Far less commonly, they’ll can be used as a contraction of they shall.

They’ll is a combination of they will, in which the apostrophe (’) stands in for the first two letters of will.

Contractions of other pronouns and will are formed in the same way, including:

• I’ll (I will)
• he’ll (he will)
• she’ll (she will)
• we’ll (we will)
• it’ll (it will)

What are some words that share a root or word element with they’ll? 

• they
• will

What are some words that often get used in discussing they’ll?

• contraction

They’ll can be used in all the contexts in which they is used by itself, including in reference to multiple people or to a single individual.

Don't mess with Attack on Titan fans

They'll spoil the entire manga.

— Pride (@PridefuISin) December 22, 2020

If someone really wants to see you, they'll find a reason, they'll find a way, and they'll make the effort.

— Fact (@Fact) September 27, 2022

8yo told me last night that "when they're old enough" they'll go by they/them, and I was like "honey you can do that now if you want to." 😂 So they are they/them now, "for two weeks. Just to try it out." 😆❤️

— Oy Geralt (@thekvitcher) September 23, 2022

Is they’ll used correctly in the following sentence? 

They’ll need a bigger boat if they’re planning to travel across the ocean.