Modal Perfects

Where is my phone?

•  PAST CERTAINTY(MUST HAVE + PARTICIPLE) : 

I must have lost it !!! 

• PAST  POSSIBILITY (COULD HAVE + PARTICIPLE)  :
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•  I might have left it at home.
• I could have left it on the bus. (Alternative action) 
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• REGRET OR CRITICISM ABOUT A PAST EVENT:

I shouldn't have been in such a hurry!