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Unit 9: Adding suffixes: the spelling rules

Page 16 of 19

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

Unit StartCourse Test: Vowel and consonant suffixes. Spelling testPage 2: Vowel and consonant suffixes. Spelling testPage 3: Vowel and consonant suffixes. Spelling testCourse Test: The doubling rule, part 1. Spelling testPage 5: The doubling rule, part 1. Spelling testCourse Test: The doubling rule, part 2. Spelling testPage 7: The doubling rule, part 2. Spelling testCourse Test: The doubling rule, part 3. Spelling testPage 9: The doubling rule, part 3. Spelling testCourse Test: When to drop the letter e. Spelling testPage 11: When to drop the letter e. Spelling testCourse Test: The 'Change y' rule, part 1. Spelling testPage 13: The 'Change y' rule, part 1. Spelling testCourse Test: The 'Change y' rule, part 2. Spelling testPage 15: Rules and rule breakersCourse Test: Changing -f to -ves. Spelling testPage 17: Changing -f to -ves. Spelling testCourse Test: A final Spelling test on all the suffix rulesPage 19: A final Spelling test on all the suffix rulesUnit End

Page 16 of 19

The Spelling Rules for Adding Suffixes:

What happens to words ending in -f ?

Usually, we add the suffixes -s or -es to make plurals.

car > cars train > trains bus > buses coach > coaches

As you saw before, some words ending in y need to change:

baby > babies puppy > puppies story > stories

Teaching point - learning to spell This is also true for some words ending in f:

English spelling
 
Singular
 Plural
calf calves
half halves
leaf leaves
loaf loaves
knife knives
life lives
sheaf sheaves
shelf shelves
thief thieves
wife wives
wolf wolves
yourself yourselves

Learn the Words
Learn the Words: Change f to v when adding s

English spelling
English spelling English spelling

Not all words ending in -f follow this rule. Some stay the same:

chiefs beliefs roofs proofs

... and all words ending in -ff stay the same:

cliffs muffs tiffs skiffs

And a few words can be spelled both ways (English is a strange language!):

English spelling English spelling
Singular
 Plural
dwarf dwarfs or dwarves
hoof hoofs or hooves
scarf scarfs or scarves
wharf wharfs or wharves
handkerchief handkerchiefs or handkerchieves
English spelling English spelling

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