Question

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

For which of the following do you need to double the final consonant before adding the suffix?

Answer 1

When you put -ing- you usually double it. For instance, shopping, So the answer is ING

Answer 2

Shop-ed, Shop-er, Shop-ing.
Which makes sense :)?

Answer 3

none of them? Youre supposed to double them?