In group 3 - I gave a detailed grammar lesson on frequent mistakes at level 3, as well as the explanation between the words: trip, travel, vacation/holidays, voyages, journeys, & cruises. I explained the past simple, past continuous, and the present perfect. The present perfect most closely resembles the past tense in french, because it uses have, has and had. It's not used as past tense, but only in theses circumstances of
I have been to France.
He has worked in tourism.
Change Over Time
I have improved my English from my year abroad.
The travel industry has become more interested in eco-friendly tourism.
You have grown more mature from living on your own.
He has become less difficult to work with.
Achievement / Accomplishments
He has hiked in the Alps.
She has learned a lot from working in Africa.
The students have finished exams.
Uncompleted Action You Expect to Happen
James has not finished his homework.
She hasn't mastered Chinese, but she is improving.
They haven't arrived at the airport.
The train has not arrived yet.
Multiple Actions at Different times
I have had four classes already today.
We have had many problems while working on this project.
She has talked to many tourists about the town.