Modal Use Summary

 

Use
Modals
Examples
Remarks
Probability ///////////////////////// //////////////////////////////////////////////////// Degree of Certainty
Will Anne will come late. most certain
Must Anne must be coming late. more certain
  Can/Should Anne can be late. quite certain
  May Anne may be late. less certain
  Might Anne might be late. least certain
Capability /////////////////////////// //////////////////////////////////////////////////// Tense
Can Anne can job ten miles everyday. present
  Could Anne could run faster when she was younger. past
  Be able to Anne is able to cook Indian food. present
    The police were able to save the drowning kid. past
Suggestion /////////////////////////// //////////////////////////////////////////////////// Tense
Must You must talk to the teacher directly. present
  Have to John has to go see the doctor immediately. present/past
  Should/Ought to Anne should meet with the director before she makes a decision. present
Requests /////////////////////////// /////////////////////////////////////////////////// Degree of politeness
Would Would you open the window? More polite
  Could Could you sign here please? Equally polite
  Will Will you get me some sugar if you have a chance to stop at Tesco? Less polite
  Can Can you call John for me? Least polite
Permission /////////////////////////// ////////////////////////////////////////////////// Use
  May May I go now? Asking/Giving
Can Can I have a word with you? Asking/Giving
Prediction Will Anne will come tomorrow.  
Willingness Will You look so tired. I'll cook tonight.  

 

Auxiliary Modal Verb Diagram

 

Modal Perfective Forms
Use in Conditional Clauses
Modals in Reading

 

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