'would' is a modal verb, and when paired with 'be' (the base form of the verb 'to be'), it is used to discuss potential or hypothetical situations. It can also indicate a future event from a past perspective.
If I won the lottery, I would be ecstatic.
That would be lovely, thank you.
He said he would be attending the meeting tomorrow.
'Would be' is often used in the second conditional to talk about unreal or improbable situations. Ensure that the condition (the 'if' clause) is in the simple past tense. Avoid confusing 'would be' with 'will be.' 'Will be' is used for definite future events, while 'would be' is more hypothetical.