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General rules 1 & 2

Words with a silent 'e'

If a word ends with a silent 'e', drop the 'e' before adding an ending that begins with a vowel. Common endings that begin with a vowel are 'ed', 'er', 'en', 'ing', 'ous'.

Examples
ripe + en = ripen
tape + ed = taped
take + ing = taking

If a word ends in 'ce' or 'ge', you keep the 'e' when you add 'ous' or 'able'.

Examples
marriage + able = marriageable
service + able = serviceable
outrage + ous = outrageous

Doubling the last consonant

In single syllable words ending in a consonant that follows a vowel, you double the consonant when adding 'ed', 'er', 'est', 'ing'.

Examples
tap + p + ing = tapping
rub + b + ed = rubbed
Remember this is only the case when a single consonant follows a single vowel.
Examples
feel + ing = feeling
meet + ing = meeting

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General rules 3 & 4

 

 

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