1-1-1 Doubling Rule

The 1-1-1 Doubling Rule states that when a one-syllable word ends with a single vowel followed by a single consonant, you double the final consonant before adding a suffix that begins with a vowel.

The word 'run' is a 1-1-1 word because it ends with a single vowel 'u' followed by a single consonant 'n'.

You double the final consonant before adding '-ed'. For example, 'plan' becomes 'planned'.

You double the final consonant before adding '-ing'. For example, 'hop' becomes 'hopping'.

Yes, 'sit' is a 1-1-1 word because it ends with a single vowel followed by a single consonant.

The correct spelling is 'dropping'.

The correct spelling is 'skipping'.

If a word ends with two vowels or two consonants, you do not double the final consonant.

Yes, 'nod' is a 1-1-1 word.

The correct spelling is 'chopping'.