Verb conjugation of "trattenere" in Italian

I have studied French for many hours per week, and I've even lived in Geneva for a while... my French was good than. Today, I have forgotten most of it. I have to re-learn and Vocabulix can help.
The last sentence is the hardest in the entire series. Writing may bore some people, but it is considered the best training in language learning. It is a skill that can lift you from intermediate to advanced level. Do not neglect it.
I play the flute, but in recent years, I had no time. My granddaughter will give birth in 2 weeks and I will be great-grandmother. But I am only 70 years old. I hope that does not scare you.