joint/separate ownership

[retro]

Webster states that to show joint ownership or a similar relationship, either the last noun alone or each of the nouns takes the possesive form.

Ex: My mother and father's wedding or
my mother's and father's wedding.

Similarly, to show separate ownership or a similar relationship, each noun takes the possessive form.

Ex: My mother's car and my father's car.
This example can be ambiguous as it may suggest eihter a joint or a separate ownership.

To mean separate ownership sticking to this form, can we say: Both my mother's and my father's car have been damaged in the earthquake and Both my mother's and my father's car each have been damaged in the earthquake?

[Delmobile]

I would say, "Both my mother's car and my father's car were damaged in the earthquake."

[not a teacher]

[aggelos]

Both my mother's and my father's car have been damaged in the earthquake

That's a good solution. Avoid using "each", as it would make the sentence rather complicated.

Delmobile's suggestion is good, too.

[amigos4]

I would say, "Both my mother's car and my father's car were damaged in the earthquake."

[not a teacher]

My mother's Toyota and my father's Honda were damaged in the earthquake.

Cheers,
Amigos4

[retro]

Thank you