Fill in one of the modal verbs from the box. И скажите в чем отличие. /can(can't) / could...

Question

Fill in one of the modal verbs from the box. И скажите в чем отличие.
/can(can't) / could / will be able / may
1) For a long time Uncas _____ not take his eyes away from Cora
2) If we find some, we ____ to make a fire and get warm.
3) - Why do you always take a knife with you, Dick? - Oh, anything _____ happen.
4) I'm afraid I_ climb this cliff. _____ I stay downstairs?

Answer 1

1) For a long time Uncas __could___ not take his eyes away from Cora. прошедшее время
2) If we find some, we __will be able__ to make a fire and get warm. будущее время
3) - Why do you always take a knife with you, Dick? - Oh, anything __may___ happen. может
4) I'm afraid I_can't climb this cliff. не могу __May___ I stay downstairs? можно