Phonics, Spelling, & Grammar Resources

Teaching the double consonant “gg” can be challenging for students as they learn when and why letters are doubled in English spelling.

The double consonant “gg” is not a standalone rule. Instead, it is part of broader spelling patterns, particularly the 1–1–1 doubling rule and patterns related to syllable stress in longer words.

Understanding how the double consonant “gg” works helps students maintain correct vowel sounds, improve spelling accuracy, and build confidence in reading and writing.

What is a Double Consonant?

A double consonant occurs when the same consonant appears twice in a row within a word (e.g. gg, tt, mm).

Double consonants appear as part of common spelling patterns in English and are often found in words with short vowel sounds.

Examples:

• digging
• jogging
• baggage

When to Use the Double Consonant “gg”

1. Doubling “g” When Adding Suffixes (1–1–1 Rule)

The most reliable time students will use the double consonant “gg” is when adding suffixes.

If a word has:

• 1 syllable
• 1 short vowel
• ends in a single consonant

→ double the final consonant before adding a suffix.

Examples:

• hug → hugging
• dig → digging
• jog → jogging

2. Doubling in Multisyllabic Words (Syllable Stress)

In longer words, doubling depends on syllable stress.

If the final syllable is stressed:
→ double the consonant before adding a suffix.

Examples:

• begin → beginning
• forget → forgetting

If the stress is NOT on the final syllable:
→ do NOT double.

Examples:

• visit → visiting
• offer → offering

Important Clarification

Most short words ending in g use a single g.

Examples:

• dog
• leg
• big

👉 Doubling typically occurs when adding a suffix.

Words That Do Not Use Double “gg”

Many words contain “g” but do not involve doubling. These should be taught as standard spelling patterns rather than exceptions.

Examples:

• legal
• eager
• plague
• rogue
• fragile

Common Student Difficulties

Forgetting to Double When Adding Suffixes

Students may write:

• joging instead of jogging
• diging instead of digging

Overgeneralising Doubling

Students may incorrectly write:

• plagging instead of plaguing

Confusion with Vowel Patterns

Students may confuse:

• jog and rogue
• bag and baggage

Difficulty with Multisyllabic Words

Students may write:

• begining instead of beginning

Teaching Tips for Double Consonant “gg”

• Focus on the 1–1–1 rule when adding suffixes
• Explicitly teach syllable stress in longer words
• Use word building activities (dig → digging)
• Compare correct and incorrect spellings
• Reinforce through reading and writing tasks

Example Words with Double Consonant “gg”

• digging
• jogging
• hugging
• beginning
• forgetting
• baggage

Final Thoughts on Teaching the Double Consonant “gg”

Understanding the double consonant “gg” helps students apply spelling patterns more accurately, particularly when adding suffixes such as -ed and -ing. Rather than teaching “gg” as a standalone rule, it is more effective to focus on the 1–1–1 doubling pattern and how syllable stress affects spelling in longer words.

With clear modelling, repeated exposure, and targeted practice, students can develop confidence in recognising when doubling is required and when it is not.

To make teaching double consonants easier, explore our ready-to-use resources below to support your phonics lessons and reinforce student learning.