Past Present Modals of Deduction

I'm sure he ate some chocolate.

• He must have eaten chocolate

• He can't have eaten chocolate

• He may have eaten chocolate

• He might have eaten chocolate

I'm sure the dog played in the mud.

• The dog must have played in the mud.

• The dog must played in the mud.

• The dog must have play in the mud.

• The dog must play in the mud.

Megan Fox looks different now. Maybe she had a plastic surgery?

• She may have had a plastic surgery.

• She could have had a plastic surgery.

• She might have had a plastic surgery.

• She can't have had a plastic surgery.

Rihanna is rich. I'm sure she didn't steal the necklace.

• She can't have stolen the necklace.

• She must have stolen the necklace.

• She may have stolen the necklace.

• She should have stolen the necklace.

Melania Trump loves her husband. I'm sure she didn't marry him for money.

• She can't have married him for money.

• She can't married him for money.

• She can't have marry him for money.

• She can't marry him for money.

Maybe somebody scratched my car in front of the supermarket.

• Somebody may have scratched my car in front of the supermarket.

• Somebody may scratched my car in front of the supermarket.

• Somebody may have scratch my car in front of the supermarket.

• Somebody may scratch my car in front of the supermarket.

I'm sure he didn't do it = ?

• He can't have done it.

• He can't do it.

• He must have done it.

• He might have done it.

I'm sure he did it = ?

• He must have done it.

• He can't have done it.

• He must do it.

• He should have done it.

Maybe he did it = ?

• He may have done it.

• He might have done it.

• He could have done it.

• He can't have done it.

Maybe it's a sculpture.

• It may be a sculpture.

• It must be a sculpture.

• It can't be a sculpture.

• It could be a sculpture.