Common mistake to avoid with modals ---------
- Modal verbs (auxiliary) only have one form which never Changes. eg:They do not take 's' in the third person singular subject.
- Always use base form of the verb after the modal auxiliary. eg: He must work hard to get success.
- Modal verbs are auxiliary and they don't take another auxiliary to form the negation or question.
The most common modal auxiliary
Can = Could
May = Might
Shall = Should
Will = Would
Must. = Ought to
Modal auxiliary primarily expresses -----
Possibility, ability permission, prohibition,obligation, certainty and advice.
Let's see one by one how do they perform---
Can ====Ability
May==== Permission
Might===Possibility
Will ==== Certainty
Should== Advice
Must === Obligation
Ought to = Obligation.
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Examples:-----------
1)He can score century.
(Replace the modal auxiliary by another showing Obligation)
Ans--He must score century.
2) You must do a hard work to get success.
(Replace the modal auxiliary by another showing advice)
Ans- You should do hard work to get success.
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