I couldn’t tell the rule for liaisons either: to me it’s natural, but then again it’s my native language. I guess I could check in a grammar, but in this case, I think that a ‘t’ at the end of a word always links to a vowel at the beginning of the following one. For this sentence, making the liaison seems more natural to me, but I probably wouldn’t notice it if you didn’t do it, and most other people wouldn’t either.
Thanks to everyone for the replies so far. My own inclination is to agree with **severus ** and say “yes” to all three questions, but there are others in the choir who disagree. Given the tempo at which we sing some of these passages it probably won’t make much difference anyway.
Maybe, but you have to consider that this third sentence is in itself “very high register” due to the tense used and the wording. So, if it’s ever pronounced (probably read aloud, since such a sentence is very unlikely to find its way in an ordinary conversation) it will probably be pronounced with the liason.
I thought much the same clairobscur. The use of the *passé simple * of *avoir * suggested a “high register” approach to me. The problem is that when we sing the “Quand ma mère…” line we are acting the role of a drunken men’s chorus in a tavern somewhere in Leipzig. Other choristers are arguing that if we were *really * drunken men we wouldn’t worry too much about the liaison.
The use of the *passé simple * (preterit) is an indication that the level of French of higher, not colloquial, and the liaison is a must.
(francophone here, with special interest in languages and “good” French)