Positive Modal Past Future 1a can could cannot use can use rule 2a 2a to be able to was/were able to will be able to 3a to know how to knew how to will know how to Negative Modal Past Future 1b cannot could not cannot use can use rule 2b 2b to (not) be...
Usage Modal Verb Example Have the ability to do something (positive) can / to be able to Many people can speak more than one language. Many mothers are able to manage a family and a full time job. Have the knowledge which gives the ability to do something (positive)...
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...
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...
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