In my textbook it says the following:
seas = Second person familiar form - Indicates something might be.
It then gives the following examples to show how it works:
Example 1:
[I hope] that you be [a nice person].
que seas
Example 2:
[I'm so glad] that it's [you]!
que seas
I understand the first example, because the speaker is hoping the the other person might be nice.
But I don’t get the second example.
How can “it’s”
be something that might be
?
Why does Spanish language use Seas
to mean It's
?
seas
to show that he is really happy that it's you?