Question

HOW I CAN USE ( WHETHER OR NOT) in academic writing for CAEL exam

Answer 1

se whether when discussing two or more alternatives. For example, "I'm not sure whether I know how to use the word 'if' properly." In this sentence the alternative, "or not," is implied. It is appropriate to include the alternative in this form: "I'm not sure whether or not I know how to use the word 'if' properly." This usage can sound awkward so the implication is sufficient.