"Grandfather and grandmother are eating a salad."
Translation:El abuelo y la abuela comen una ensalada.
The correct answer:
"El abuelo y la abuela comen una ensalada."
Seems to me would translate to:
"Grandfather and grandmother eats a salad."
Doesn't "eating" require a present participle form of the verb or the infinitive?
no, the present tense works here, although estan comiendo would be correct as well.