How can you tell when "vo" refers to grandmother or grandfather? It didn't seem to be apparent in the sentence translations- I didn't see any clues in the forms of the other words.
In their written form, you have to pay attention to the accents: "vô" refers to grandfather and "vó" to grandmother.
Pronunciation-wise, the "ô" in "vô" is pronounced the same way as the first "o" in "ovo" (egg) while the "ó" in "vó" is pronounced the same way as the first "o" in "óculos" (glasses).
Thank you. I didn't notice the difference in the accents until you pointed it out.