How to add emphasis as with “I do” or “I did”?

Question

I know the verb faire means to do or “to make”, but is this the appropriate way of saying simply “I do”? For instance, if someone asks “Do you like it?” and you want to reply “Yes, I do.” Or, “Did you take out the trash?”: “Yes, I did.”

I realize I could just respond oui, but in English we frequently add I do for emphasis: is there a similar use or construct in French?

Answer 1

No, as far as I know, there is no such construct in French. However, you have other options for emphasis besides variations of intonation

Using an adverb

Usually beaucoup or others amplifiers énormément, terriblement, absolument… As in

— Tu aimes les rollmops ?
— Oui, beaucoup.

One can also drop the oui in these cases

— Tu aimes les rollmops ?
— Absolument.

Repeating the verb of the question

— Voulez-vous porter plainte ?
— Oui, je le veux.

— Mangez-vous des rollmops ?
— Oui, j'en mange.

Using substitutes to oui

As en effet, tout à fait, though these convey only a slight emphasis in my opinion

— Mangez-vous des rollmops ?
— Tout à fait.