Obligation and permission
To express permission in English, we can use_______ or _________to.
Let / be allowed to
This is a good idea: You should think about this.
Correct!
This is a prohibition: You mustn't do this. Just run
away from it.
Correct!
What's the difference?
1. We didn't need to wait for them. They arrived just after us.
2. You needn't have waited for them. They said they weren't going to come.
1. They didn't wait.
2. They waited.
We use________to talk ability in the past in a general way.
Could
Both sentences mean the same:
They must study for the exam otherwise they will fail.
They have to study for the exam otherwise they will fail.
Correct!
To say something is or isn't a good a idea we use________ or __________.
Should / had better
We can use mustn't or don't have to to express prohibition.
Incorrect!
What's the difference in meaning?
1.I didn't need to prepare all that food. They phoned to say they wouldn't be coming.
2.I needn't have prepared all that food. They phoned to say they wouldn't be coming.
No difference!
We use_________and_________to talk about ability at specific moments in the past.
Was/were able to and Succeeded in
We can also use BE________ to talk about obligation.
SUPPOSED TO
Which modal verb do we use to give a WARNING?
HAD BETTER
What's the difference?
1.You have to quit smoking otherwise you will die.
2.I must phone her.
1. I have no choice.
2. It's my decision.
Free 300 Points!
Congratulations!
Complete: Yesterday I (1)____________in playing the song correctly for the first time but I(2)___________to play it again later on. I wish I (3) _________play it everytime I tried.
1.Succeeded
2. wasn't able
3. Could