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Unit 9: Adding suffixes: the spelling rules

Page 3 of 19

Unit 9: Suffixes: why we need to double letters, change them or drop 'e'

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Page 3 of 19

The Spelling Rules for Adding Suffixes

In the last test, you did not need to change the root word when you added the suffix.

For example:

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painful cleaned thicken dusty
 
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Teaching point It is not always so easy!

First - remember that there are two kinds of suffix.

  • Vowel suffixes – that start with a vowel.
  • Consonant suffixes – that start with a consonant.

Sometimes we need to double a letter:

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run + ing = running spot + ed = spotted mad + er = madder
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Sometimes we need to drop the letter e:

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date + ing = dating froze + en = frozen shine + y = shiny
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And sometimes, we have to change the root word:

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copy + ed = copied happy + ness = happiness leaf + s = leaves
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