Positive Modal Past Future 1a will will/would have will be 2a must must have – 3a should should have should be 4a ought to ought to have ought to be 5a might might have might be 6a could could have could be 7a may may have may be Negative Modal Past...
Examples of modals expressing certainty and deduction Usage Modal Verb Example Certainty (positive) Will Crime will increase unless stricter penalties are introduced. Highly likely (positive) Must It must be terrible for people who have to spend time in prison for...
Positive Modal Past Future 1a Must Cannot use must Use rule 2a Cannot use must Use rule 2a 2a Have to had to will have to 3a Need to Needed to will need to 4a Should Should have should 5a Ought to Ought to have ought to 6a be allowed to were allowed to will be allowed...
Usage Modal Verb Example No choice – you have to do this Must / have to As citizens we must obey the laws of the country in which we live. No choice – you cannot do this Must not /not be allowed to / cannot Citizens must not break the laws of the society in which they...
