Unit:8 Past Modals for Specultion

Note: You can use these modals to speculate about the past.

Example:

• They must have gotten tied up in traffic: I bet they got tied up in traffic.
• She could have tried to find= It's possible she tried to find.
• He may have done a fire=May be he done a fire.
• She might have remembered =It's possible, she remember.
•  

Negative Form:

• They couldn't have done=It's not possible they done.
• She may not have found a new job=It's not possible, she found a new jod.
• He might not have been fired=It's not possible, he fired.