adjectives

What are the comparative and superlative forms of the adjectives "shy" and "sly"? I understand that they do not change "y". Is it true?
Are there any more adjectives which are exceptions to the rule?

Furthermore, please correct me whenever I make a mistake, if possible.


Thank you very much in advance.[ Is "in advance" correctly used in this sentence?]

Thank you everybody for being so nice with me!

[Tdol]

You'll see both shyer and shier. I think the reason for not making the change could be about keeping the word recognisable, the same way many write ageing not aging.

Yes, 'in advance' is correct.

Originally Posted by tdol

You'll see both shyer and shier. I think the reason for not making the change could be about keeping the word recognisable, the same way many write ageing not aging.

Yes, 'in advance' is correct.

Thank you very much for helping me.