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107
Following instructions and understanding rules
Maybe
you are wondering what the difference between them is.
Let´s find out: all the auxiliary verbs except be, do and have are called modals.
Unlike other auxiliary verbs, modals only exist in their helping form. They cannot act
alone as the main verb in a sentence. Study Grammar Box 1.
Grammar Box 1 -
Modal verbs
Modal
Example
Uses
Can
They can control their own budgets.
We can’t fix it.
Can I smoke here?
Can you help me?
Ability / Possibility
Inability / Impossibility
Asking for permission
Request
Might
Your bag might be in the kitchen.
Possibility
May
May I have another cup of coffee?
China may become a major economic power.
Asking for permission
Future possibility
Must
We must say good-bye now.
They mustn’t disrupt the work more than
necessary.
Necessity / Obligation
Prohibition
Shall
Shall I help you?
Suggestion
Would
I would love to visit Cancun.
Unreal or imagined situations
Should
We should sort out this problem at once.
I think we should check everything again.
Profits should increase next year.
Saying what’s right or correct
Recommending action
Uncertain prediction
Have to
I have to arrive at work at nine o’clock.
You have to pass your exams.
Strong obligation
Obligation necessary
Could
Could I use your computer?
You could see a movie or go out for dinner.
Pedro could go to jail.
Request
Suggestion
Possibility