![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbRPSDIrAWAHZLLPJTUCyT5eFPSHVUaNWrfxDuoJtFa8IOphEZJ_2B4MJZUbZoGDurRj8-WZVTJUOfyje6QcGvhwmPpxlUv41gL7JV2jMrUI6Y4MS451coY7L_iiSVQtaTQDfipNYGKuQ/w400-h103/functions1.gif)
A: Where's John? He isn't in the living-room.
B: He must be in the bathroom. He can't still be in bed.
A: Is Mr. Smith in his office?
B: It's half past nine, so he should be there.
A: Is the headmaster in the teacher's room?
B: I don't know. He may be there.
A: Are the children still awake?
B: They might be, but I doubt it. They went to bed an hour ago.
modal auxiliary+have+past participle:
B: I don't know. She has probably gone to see the manager.
A: I wonder why James is so late this evening?
B: He wasn't feeling very well this morning, so he may have gone to the doctor's on his way home from work.