Modal Auxiliaries

Modal auxiliary verbs can not be used on their own and appear with a main verb.

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.

---------------------------------------------------------------

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.

------------------------------------------------------------------