When you are not sure about a thing, you can express your uncertainty with a dubious sentence. For example, Miquel asks Núria to buy a present for Pau. Núria does not know very well Pau and she is afraid of not chosing it good. Then she tells Miquel that he may not like what she will buy.
Núria: Mmm... Potser no li agradarà…
Listen again the sentence you have just heard. Listen to the melody of the sentence: the voice raises at the last stressed syllable of the sequence and then falls a little bit.
Now listen to the sentence as many times as you want and pay attention to the graphic. Watch (and listen) how the voice raises at the last stressed syllable of the sequence and then it falls a little bit.
Now pronounce the sentence with the same dubious intonation. Imagine that you are talking with a friend. She asks you what she can buy as a present for a person that you do not know very well. You tell her: dius “Potser li compraria un llibre...”, but you are not sure. After saying it, listen how it is pronounced.
Now imagine that you are talking with David, a colleague of the office, and he asks you where is Marc, another office colleague. You think that he has go for breakfast, but you are not sure and you tell him "A la cafeteria...", but you are not sure. After saying it, listen how it is pronounced.
Listen to these sentences and say if their intonation is appropriate for the context.