There might be some rules that can be applied to Spanish grammar.
*Subject and verb should agree on number. For example, Ella esta escribiendo.
* Adjectives and noun should agree on gender and number. La casa es hermosa. Los arboles son pequeños.
Quero nadar ; i want to swim
adonde voy ; where will i go
a al cabina ; to the cabin
al that ; to the theater
a la piscina ; to the pool
al comedor ; to the dining room