Exam with must and have to

1. TO EXPRESS RESPONSABILITIES AND OBLIGATIONS
Must is a modal auxiliary verb. It expresses a personal obligation, what the speaker thinks is necessary so it’s the opinion of
the person speaking. It’s not a real obligation because it’s not imposed from outside.
 Dad must stop smoking.
 We must visit our uncles this month.
We can use must to talk about the present or thefuture but not about the past. To talk about the past wecan use have to. Musn’t is used to
express that something is PROHIBITED.
HAVE TO:
1. You ______________ wear a tie if you want to
go to that restaurant. It's one of their rules!
2. I ______________ go away on business, my
boss wants me to visit our firm in Japan.
3. Your daughter may ________________ try on a
few different sizes.
MUST:
1. Don't be silly, you ______________ take these
tablets four times a day !
2. I ______________ work my English: I want to
speak fluently
3. This room is a mess, I really ______________
find time to clean it!
USE HAVE TO OR MUST CHANGING THE TENSE IF NEEDED.
1) Yesterday I ________________ finish my Geography project.
2) She will ___________________ wait in line like everyone else.
3) The doctor _____________ get here soon as he can.
4) Do you __________________ work next weekend?
5) I really ________________ remember to post that letter before five o'clock
6) We ______________________ eat fish for dinner. Mom said so!
USE HAVE TO OR MUST IN AFIRMATIVE OR NEGATIVE WHEN NEEDED.
1) You _____________________ speak too loud, the baby is sleeping.
2) We _________________ forget to take the chicken out of the freezer.
3) Bicyclists _________________________ remember to signal when they turn.
4) You ________________________ do that Jane, I'll do it later, don't worry.
5) If you are under 13 you ________________________ get your parents’ permission.
6) Ana, you ____________________ leave your clothes all over the floor like this!
7) You _____________________ eat that if you don’t want to!
8) You _______________________ smoke in Paul’s car or he’ll get very angry with you!
9) You really ______________________ stop driving so fast or you’ll have an accident.
10) We ______________________________ work last night until 8 o'clock.
HAVE TO
MUST
HAVE TO: is NOT an auxiliary verb. It expresses impersonal
obligation. The subject of the sentence is obligated to act
or to do sth. by an external power (Law, parents rules, job or
school rules…). It’s not the subjects idea, it is imposed from
outside.
 In England you have to drive on the left.
 My mother has to work every day.
We use all tenses and also with modal auxiliary verbs.
Don’t have to is used to express that sth is not required.

2. MODAL VERBS – EXPRESS OBLIGATIONS ANSWER KEY
HAVE TO:
1. You _HAVE TO___ wear a tie if you want to
go to that restaurant. It's one of their rules!
2. I __HAVE TO__ go away on business, my
boss wants me to visit our firm in Japan.
3. Your daughter may ___HAVE TO__ try on a
few different sizes.
MUST:
1. Don't be silly, you __MUST___ take these
tablets four times a day !
2. I ___MUST___ work my English: I want to
speak fluently
3. This room is a mess, I really __MUST__ find
time to clean it!
USE HAVE TO OR MUST CHANGING THE TENSE IF NEEDED.
1) Yesterday I __had to__ finish my Geography project.
2) She will __have to__ wait in line like everyone else.
3) The doctor __must__ get here soon as he can.
4) Do you ___have to____ work next weekend?
5) I really __must__ remember to post that letter before five o'clock
6) We ___had to_____ eat fish for dinner. Mom said so!
USE HAVE TO OR MUST IN ITS AFIRMATIVE OR NEGATIVE FORM.
1) You ___mustn’t___ speak too loud, the baby is sleeping.
2) We ___musn’t___ forget to take the chicken out of the freezer.
3) Bicyclists ____must____ remember to signal when they turn.
4) You __DON'T HAVE TO____ do that Jane, I'll do it later, don't worry.
5) If you are under 13 you __have to_____ get your parents’ permission.
6) Ana, you __mustn’t__ leave your clothes all over the floor like this!
7) You ____don’t have to___ eat that if you don’t want to!
8) You ___mustn’t__ smoke in Paul’s car or he’ll get very angry with you!
9) You really __must__ stop driving so fast or you’ll have an accident.
10) We ___had to__________ work last night until 8 o'clock.