Full Lenght Article
Using the Modal Verbs "Can, Could to Be Able to"
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.
2. Raymond Murphy, ―English Grammar in Use,‖ Cambridge University Press
3. Raymond Murphy, ―Essential Grammar in Use,‖ Cambridge University
Submitted4 July 2022
Revised4 July 2022
Published4 July 2022