My question is about the necessity of pronouns in sentences like “This is my [adjective] one.” In English, the pronoun one is necessary for all but example #1:
- Je vais vous montrer quelques chiens. Voici mon plus rapide.
Let me show you some dogs. This is my fastest.
- Je vais vous montrer quelques chiens. Voici un qui est rapide.
Let me show you some dogs. This is a fast one.
- J’ai deux chiens. Voici mon rapide.
I have two dogs. This is my fast one.
- J’ai deux grand-pères. Voici mon paternel.
I have two grandfathers. This is my paternal one.
I made up these French sentences — are the bolded parts correct? I’m somewhat confident about the first two, but I’m not sure about #3 and #4. I know that le plus rapide is correct, but can I say le rapide to mean “the fast one”?