Question

The suffixes -ed, -er, and -ing can be added to the end of the word shop.

Answer 1

The answer should be all of the above, considering The spelling rule is: if the word has 1 syllable (a word with one vowel sound), 1 vowel and it ends in 1 consonant, you double the final consonant before you add 'ing', 'ed', 'er',