Breakdown of Tengo que limpiar los ojos del perro porque están sucios.
el perro
the dog
estar
to be (location/state)
porque
because
sucio
dirty
Questions & Answers about Tengo que limpiar los ojos del perro porque están sucios.
Why is there a que after Tengo?
In Spanish, to say you "have to" do something, you use the phrase tener que followed by an action (the infinitive verb). Here, Tengo que limpiar means "I have to clean". Without que, it would just mean "I have clean", which doesn't make sense!
Why does it say los ojos del perro instead of something like "el perro's ojos"?
Why do we use están for "they are" instead of son?
Why does sucios end in -os?
In Spanish, describing words (adjectives) must match the noun they describe in both gender (masculine or feminine) and number (singular or plural). Since sucios describes los ojos, which is a masculine, plural noun, the adjective takes the masculine plural ending -os.