FR: indice d'écoute / indice du coût de la vie

[Emiliodela93]

Hello everyone,
Would someone be so kind as to explain to me the difference between "indice d'écoute" and "indice du coût de la vie" ? I'm having a lot of trouble understanding the use of noun complements with "DE". When do you use an article and when you don't ? Can anyone recommend a textbook where this is well explained?
Thank you in advance for your help.

 

[Michelvar]

Hello, and welcome

The first one is "indice de l'écoute", and " de l' " is usually transformed into " d' ". Indice de l'écoute >>> Indice d'écoute.
The second one is "indice de le coup de la vie", and "de le" is usually transformed into " du". Indice de le coup de la vie >>> indice du coup de la vie.

de le >>> du
de la >>> de la
de les >>> des
de l' >>> d'

Concerning your last question, it is out of the scope of this forum, but you can send me a private message to explain your specific situation, if you want.