Full Lenght Article
Using the Modal Verbs "Can, Could to Be Able to"

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The distinctions and similarities between modal verbs like "can" and "could" and auxiliary verbs like "to be able to" are discussed in this article. The rules for using the abovementioned modal and auxiliary verbs in each of the three tenses (past, present, and future) are explained separately. In addition to this, you have also clarified and provided other instances of when these modal verbs and auxiliary verbs may be used interchangeably and when they can't. As a result, I recommend that you read this article, and I hope that you really like it and gain profit from it.


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Conflict of Interest Statement

The author (s) declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.


1. Martin Hewings, ―Advanced Grammar in Use,‖ Cambridge University Press
2. Raymond Murphy, ―English Grammar in Use,‖ Cambridge University Press
3. Raymond Murphy, ―Essential Grammar in Use,‖ Cambridge University

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  • Submitted
    4 July 2022
  • Revised
    4 July 2022
  • Published
    4 July 2022