Correct spelling


Correct spelling, explaination: studying is the correct spelling, because y isn’t skipped when we add -ing to a verb. Therefore studing is wrong and the mistake probably comes from the rule, that we omit vowel e when we add -ing to a verb. y remains though, and studying is the correct form.

Definition of studying:
noun, action of learning
Studying in the morning is apparently more effective.
Jimmy hates studying. I’m afraid he’s going to fail final exam.

Incorrect spelling


Incorrect spelling, explaination: consonant y isn’t skipped when we add suffix -ing to a verb. This is the reason why studing is an incorrect spelling, and we should spell this form as studying – with y that is ending the base form of the verb.