Sat March 07, 2015 By: Asavari Bhelawe

how to use model auxiliaries

Expert Reply
Snehal Naik
Mon March 09, 2015
The verbs can, could, will, would, shall, should, may, might, must, and ought are verbs which help other verbs to express a meaning. These are called modal verbs. 
  • Modal verbs are NEVER used with other auxiliary verbs such as do, does, did etc. 
  • The negative is formed simply by adding "not" after the verb. 
  • Questions are formed by inversion of the verb and subject.
He should not talk like that.
Could you pass me the salt and pepper, please?
  • You can never add an "-s" or "-ed" to a modal verb to change its form.
  • Except for ought to, modal verbs are NEVER followed by to

Modal verbs are used to express doubt, certainty, possibility and probability, obligation and permission (or lack of these)

I hope the above information helps. 

Happy Studying! 

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