oxford_guide_to_english_grammar

12 MODAL VERBS
PAGE 128
NOTE
a Americans mostly use the patterns with to.
b We use How dare... ?for an angry protest.
How dare you speak to me like that?
c I dare say means 'probably'.
I dare say you'll feel better tomorrow.
102 Overview: the use of modal verbs
Deciding/Allowing/Telling
Prediction/Possibility
will
Deciding • 71 (4) Prediction (future) • 71 (3)
I'll have coffee.
Tom will be at home tomorrow.
Willingness • 71(5) Prediction (present) • 95
I'll help you.
Tom will be at home now.
Will you help me? Prediction (habit) • 100(1)
Formal order • 71 (9)
Tom will always arrive late.
All pupils will attend.
Asking what to do • 71(7)
What shall I do?
Shall I help you?
Promise •71(8)
You shall have the money.
Formal rule • 71(9)
A game shall last one hour.
shall
Prediction (future) •71(2)
I/We shall be away next week.
would
Request • 99(2) Prediction (unreal) • 99(1)
Would you help me?
A holiday would be great.
Willingness (past) • 80(2) Prediction (past) • 80(2)
The baby wouldn't go to sleep.
The result would surprise us all.
Prediction (past habit) • 100(1)
Tom would always arrive late.
must
Necessity • 92 Logical necessity • 95
You must be careful.
You must be tired.
No necessity • 92(3)
You needn't hurry.
Necessity not to do something.
• 92(4)
You mustn't forget.
needn't
mustn't