Modal verbs may/might/can/must are often used with present perfect structures to specul...

We may have taken a wrong turn; I don’t think this is the way to the club.

You must have left your passport on the table. I remember seeing it there this morning.

They should be here by now. You might have sent them the wrong address.

She couldn’t have been to both places at the same time, there’s something wrong in this report.

I have lost my camera, and I could never recover the pictures I took during that trip to Canada.