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The “y” doesn’t change for the suffix “-ing”. 

When you add a suffix that starts with “e” (such as -ed, -er, or -est) to a word that ends in “y”, the “y” usually changes to an “i”.

If the word in question has two consonants before the “y”, change the “y” to “i" before adding the suffix “-ly”.

If the word ends with CVC (consonant + vowel + consonant) we always add an extra consonant before adding the necessary suffix.