The modals are:
Can (can´t / cannot) Could (couldn´t / could not)
May (may not) Migth (migthn´t / migth not)
Will (won´t / will not) Would (wouldn´t / would not)
Must (mustn´t / must not) Should (shouldn´t / should not)
Be careful!! Modals have only one form. For example, they do not take an "-s" in the third person singular.
The semi - modals are:
Have to
It has a similar meaning to must, but it does change its form depending on person and tense:
have / has (got) to (don´t / doesn´t have to / do / does not have to, haven´t / hasn´t got to / have / has not got to + didn´t have to, etc)
ought to (oughtn´t / ought not to)
It has a similar meaning to sholud. It doesn´t change its form depending on person and tense.
Be careful!! Modals are never followed by the full infinitive (with to). Use the bare infinitive.
Example: I can´t go to the party.
Brian Rueda Pichilingue
