01 A may, might módbeli segédigéket akkor használjuk, amikor valószínűséget szeretnénk kifejezni, a must-ot pedig amikor kötelességet.

02 Nincs különbség.

03 A must-ot akkor használjuk, amikor a kötelességgel egyet értünk és ezt ki is szeretnénk fejezni.

04 Lehet, hogy megcsináltam/megcsináltad/megcsinálta/… .

05 Bizonyára megcsináltam/megcsináltad/megcsinálta/ … .

06 They may have forgotten the names. / They might have forgotten the names.

07 They may have gone to the zoo. / They might have gone to the zoo.

08 Tom may have cleaned his flat. / Tom might have cleaned his flat.

09 George may have bought that car. / George might have bought that car.

10 Carol may have ordered the gifts from the Internet. / Carol might have ordered the gifts from the Internet.

11 You must have left your key in the car.

12 They must have watered the plants.

13 They must have sent the letters.

14 They must have seen the horror film.

15 You must have read these books.

16 They may have repaired your bike. / They might have repaired your bike.

17 They must have taken the boxes.

18 They may have sold the books. / They might have sold the books.

19 They must have replaced the windows.

20 Jim may have called them. / Jim might have called them.