Two things which have pretty much already been pointed out:
An nighean agam makes it "my daughter" instead of "I have a daughter" and if the adjective were directly describing the subject it would be "mhodhail" instead of modhail.
"Tha nighean mhodhail agam" would be "I have a well-behaved daughter."
i actually really like this word, "modhail". you know what it sounds like to me? model. NOT as in model--starving, runway chick. rather, model--cambridge dictionary definition: "something that a copy can be based on because it is an extremely good example of its type". words, their meanings and/or their connotations, were so much richer back in the day...but i am a relic, and i tend towards the archaic.
i didn't want to sacrifice a perfect score on this lesson, but it would be really cool if, "my daughter is model," could be accepted as an answer!
I am so confused about this one. In the last set of questions I put "my son is well-behaved" and it was wrong, it should have been "I have a well-behaved son". This one I put "I have a well-behaved daughter" but it should have been "my daughter is well-behaved"! Can someone explain the difference? My understanding is that "tha an nighean agam modhail" = "the daughter at me is polite/well-behaved". To me that reads as both "I have a well-behaved daughter" AND "my well-behaved daughter"! What's the distinction? Thanks in advance!