The document discusses the meanings of "must" and "have to" when used with infinitives. It states that "must" and "have to" both indicate obligation and mean the same thing. It then provides examples showing how "mustn't" and "don't have to" indicate prohibition or that something is not necessary. Finally, it suggests using "Must I..." or "Do I have to..." to ask about obligation.
2. TIME TO THINK...
You have to speak in the oral exam
You must speak in the oral exam
Do they mean the same?
3. TIME TO THINK...
You have to speak in the oral exam
You must speak in the oral exam
Do they mean the same? YES,OBLIGATION
MUST
HAVE TO
+ INFINITIVE
4. TIME TO THINK...
Do they mean the same?
1 2
A. This is a final test. Don't speak to your classmates!
B. This is only a written text. So, it's not necessary to
speak. We're doing the speaking test next week.
5. TIME TO THINK...
Do they mean the same? NO
1 2
What do they mean? Connect the messages.
A. This is a final test. Don't speak to your classmates!
B. This is only a written text. So, it's not necessary to
speak. We're doing the speaking test next week.
6. TIME TO THINK...
Do they mean the same? NO
1 2
What do they mean? Connect the messages.
A. This is a final test. Don't speak to your classmates!
B. This is only a written text. So, it's not necessary to
speak. We're doing the speaking test next week.
1
2
7. TIME TO THINK...
You don't have to speak in the exam
You mustn't speak in the exam
How would you say it?
1 2
Connect the messages.
8. TIME TO THINK...
You don't have to speak in the exam
You mustn't speak in the exam
How would you say it?
1 2
Connect the messages.
1
2
11. SO,
To express:
MUSTN’T
DON’T HAVE TO
+ INFINITIVE
PROHIBITION
Something is not
NECESSARY
We use:
And if I want to ask?
Must I speak in the oral exam?
Do I have to speak in the oral exam?
12. SO,
To express:
MUSTN’T
DON’T HAVE TO
+ INFINITIVE
PROHIBITION
Something is not
NECESSARY
We use:
And if I want to ask?
Must I speak in the oral exam?
Do I have to speak in the oral exam?
OBLIGATION
