Questions & Answers about Aquest múscul està cansat.
Because múscul is a masculine singular noun, and aquest has to agree with it.
Catalan demonstratives change for gender and number:
- aquest = masculine singular
- aquesta = feminine singular
- aquests = masculine plural
- aquestes = feminine plural
So:
- aquest múscul
- but aquesta cama
Catalan has two main verbs for to be: ser and estar.
Here, estar is used because cansat describes a state or condition: the muscle is tired, not permanently defined that way.
A very useful rule for learners is:
- ser = identity, classification, essential characteristics
- estar = condition, state, location, many temporary situations
So està cansat is the normal way to say is tired.