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Verb tenses in academic writing

Modal verbs

  • Modal Verbs (e.g. can, may, must) are auxiliary verbs that you use with main verbs to do the following:

show ability, probability or necessity 

give advice or permission 

  • They can express the present, past or future tense. 
  • You must not use ‘-s’ with the third person singular:

He must study hard this weekend.

To do

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