Modals
|
No.
|
Type of modals
|
Past
|
|
|
1
|
Ability
|
can
is/am/are able
to
|
Could
Was/were able
to
|
|
2
|
Possibility
|
May
Could
Might
Can’t
|
Might
|
|
3
|
Asking
for/permission
|
May
Could
Can
|
|
|
4
|
Obligations
|
Must 1
Have to
Need to
Have got to
Is/am/are to 2
|
Had to
Needed to
Was/were going
to
|
|
5
|
Suggestion
|
Should
Ought to
Is/am/are
supposed to
Had better
|
Should have V3
Was/were
supposed to
|
|
6
|
Certainty
|
Must
|
Must have V3
|
|
7
|
Future activities
|
Will
Is/am/are
going to
Shall
|
Would
Was/were going
to
|
·
(+) S + Modal + Verb base (Verb 1)
I can read this book.
You should study hard.
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