Questions & Answers about Je visite le laboratoire avec Marie.
In French, the simple present (je visite) usually covers both English I visit and I am visiting.
So:
- Je visite le laboratoire = I visit the laboratory / I am visiting the laboratory.
You don’t usually need an extra verb like être (to be) or aller (to go) to make a “continuous” form.
You can say:
- Je vais visiter le laboratoire. = I am going to visit the laboratory (future intention).
- Je suis en train de visiter le laboratoire. = I am in the middle of visiting the laboratory (emphasizes “right now”).
But for a normal present action, je visite alone is correct and natural.