Перепишите предложения. Поменяйте модальные глаголы их эквивалентами и поставьте их в

1) Forests could be considered the main resources in Canada. Forests will be able to be considered the main resources in Canada. Леса можно считать основными ресурсами в Канаде.

 2) One might follow French traditions in Quebec. One will be allowed to follow French traditions in Quebec. В Квебеке можно следовать французским традициям.

3) There had to be many tourists in Canada. There will have to be many tourists in Canada. В Канаде обязано быть много путешественников.

Can, may, must are modal verbs. We dont use to before modal verbs and we dont use to after modal verbs. Could is the past form of can, might is the past form of may. Must hasnt past form. The equivalent of must is have to. We use had to for past of must.