Tienen and Ustedes Tienen
Tienen = they have but adding the word Ustedes = you then the word Tienen become =you have so basically Ustedes simply elminate the "they " and add the "you" now if we put in a sentence Ustedes Tienen sed= you are thirsty so now Tienen changed to "are" not they have not they but "ARE" please explain Thank you in advance
2 Answers
The easy answer is that ellos,ellas,and ustedes all share the same ending---tienen.
It the same with él, ella, and usted. They all share the same ending, "tiene"
Tienen sed means that some folks are thirsty,(or you-all are thirsty)
This is why we do like to add the pronoun in this case for clarity.
Ellos tienen sed. They are thirsty (they have thirst) --this is an idiomatic expression BTW.
Ustedes tienen sed. You-all are thirsty (you all have thirst)
There are a BUNCH of expressions where the English uses "to have" instead of "to be"
I am afraid. "Tengo miedo" I am 30 years old. "Tengo treinta años."
( I hope that I have understood your question correctly.)
Tienen sed can be ellos, ellas or ustedes. It means literally have thirst, not be thirsty. That isjust how the general concept is put in Spanish.
If you need to clarify
Ellos tienen sed- They (including at least one male) are thirsty
Ellas tienen sed- They (all female) are thirsty
Ustedes tienen sed- You all are thirsty
You can drop it from any of the above if it is clear from context.
A small group of friends are at my house, and I ask ¿Tienen sed? - it is fairly obvious I am saying: Are you all thirsty.
Dialogue (I know it is kind of a dumb one, but I dont have time to think of a better one):
¿Por qué beben ellos agua? Why are they drinking water. Or simply drop ellos and gesture at a group over there.
Porque tienen sed. Because they are thirsty. From prior context we know you are talking about them.
Hopefully somewhere in here I have covered what your confusion is.