English - use of have to, don't have to, must and mustn't

Use of have to and must and examples

1. ADULTS IV UNIT 5C
haveto, don’thaveto, must, mustn’t

2. MUST / MUSTN’T
+Shemusttidyherroombeforeshegoesout.
- Youmustn’tsmokein class
Use must+infinitivetotalkaboutrules and obligations.
Use mustn’t+infinitivetosaysomethingisprohibited.

3. HAVE TO / DON’T HAVE TO
+ Shehas togetup at 7.oo everyday.
- He doesn’thavetoworkonSaturdays.
Usehaveto+infinitivetotalkaboutrulesandobligations,
ortosaysomethingisnecessary.
Usedon’thaveto+infinitivetosaythereisnoobligation,
orsomethingisnotnecessary.

4. 1)Don’tcontracthaveorhas.
I havetogo. NOT I’vetogo.
2) Mustand haveare verysimilar, butthereisa
smalldifference. Wenormallyuse havetofora
general obligation(a rule at work). Wenormally
use mustwhenthespeaker imposesthe
obligation.

5. Choosethecorrectoption
You….. smokein thisroom.
A) Must
B) Mustn’t
C) don’thaveto

6. Choosethecorrectoption
I …. do my homework.
A) Must
B) Haveto
C) don’thaveto

7. Choosethecorrectoption
We…. bequiet.
A) Must
B) mustn’t
C) don’thaveto

8. Choosethecorrectoption
You…. makenoisein thisarea.
A) Must
B) mustn’t
C) don’thaveto

9. Choosethecorrectoption
You…. puttherubbishintothebin.
A) Must
B) mustn’t
C) don’thaveto

10. Choosethecorrectoption
You…. Takephotosin thismuseum.
A) Haveto
B) mustn’t
C) don’thaveto

11. Choosethecorrectoption
You…. speakonthephoneonan
aeroplane.
A) Haveto
B) mustn’t
C) don’thaveto

12. Choosethecorrectoption
You…. swimin thisriver. It’s
dangerous.
A) Haveto
B) mustn’t
C) don’thaveto

13. Choosethecorrectoption
Thetrafficlight isred. You…. stop!
A) Haveto
B) must
C) don’thaveto

14. MODIFIERS
(Theymodifytheadjective).
LearningChineseis
incrediblydifficult!