Duke and Duchess of Cambridge attend the Together at Christmas carol service

What do you think the speaker is expressing with the word 'yeah'?

In what context do you think the word 'yeah' is used in this text?

How might the tone of the conversation change with the use of 'yeah'?

What emotions or reactions could be associated with the word 'yeah'?

Can you provide an example of a situation where 'yeah' might be used?