Modals Speculating about the past

 Modals Speculating about the past

• Could have (No sure)+ past verb 

They canceled their hiking plans. They could have read about that scaped pear.

• Might have (No sure) 

He refuses to go in the water. He might have seen a jellyfish.

• May have (pretty sure) 

She won't get out of the car now. She may have heard the neighbords day fighting.

• Must have (Very sure) 

They took her to the hospital inmediately. That spider must have been poisonous.