Remember: "Must" kann keine Vergangenheit bilden. Man muss daher auf eine Form von "have to" ausweichen.

Setze die Aussagen in die Vergangenheit. Benutze die Kurzformen.

1) I must help my father.
Yesterday .

2) Sally must buy some tea.
Two days ago some tea.

3) We must do our homework.
Yesterday our homework.

4) Our dog must have a bath.
Yesterday a bath.

5) I must be there at two o'clock.
Last Sunday there at two o'clock.

6) I needn't cut the grass in the garden.
Last weekend the grass in the garden.

7) Graham needn't ask his sister for help.
Yesterday his sister for help.

8) The Bakers needn't buy a new computer
Last year a new co mputer.

9) We needn't have lunch at twelve o'clock.
Last Thursday at twelve o'clock.

10) Jack needn't be here to help me..
Last Sunday Jack here to help me.