1. She was sitting next to my seat.
2. Sita will have reached school.
3. Has the bus out of ordered?
Note:- In spoken english people say :- Is there anything wrong with the bus?
4. Will they have cropped? or Will they have harvested?
2. Sita must have reached school. (“Must” in the sense of expressing strong probability)
3. Would the bus have gone out of order?
4. Would he have harvested?