20180111

Modal


MODAL
Will
Must
Shall
Could
Should
Would
Might
May
Had Better
Can
Ought to



The basic rule of ‘Modal’ is: Modal always followed by Infinitive
Modal + Infinitive

Infinitive is Base form of a verb. That is a verb which has not any changes or addition.

Notice the difference between ‘Present Verb’ (V1) and Infinitive:
-     She drives slowly and carefully.
-     My mother cooks the dinner happily.
-     Andrew buys a new coat.
Because the subject is third singular party (he), so the verb must be added with an ‘S’ V1 + s (Buy + s)


-     He should drive slowly and carefully.
-     My mother would cook the dinner.
-     Andrew will buy a new coat.
Because there is Modal Will, so the verb ‘buy’ cannot be added with an ‘s’ (Infinitive) even though the subject is: he/she/it.


*  WILL
Will is used to express future action.

*  WOULD
Would is used to express future action in the past (past future).

*  CAN
Can is used to say that something can happen or that someone has an ability to do something:
-     We can see the mountain from our classroom window.
-     I can help you with the homework.
   Can you operate computer?
-     Sarah can’t come to my party.
The negative form of Can is Cannot (Can’t).


*  BE ABLE TO
Be able to has the same meaning as Can:
-     We are able to see the mountain from our classroom window.
-     I am able to help you with the homework.
   Are you able to operate computer?
-     Sarah is not able to come to my party.