Download - Suffix -ous
Suffix -ous
Success Criteria
Aim• I can use and spell words correctly with the suffix -ous.
• I can explain what a suffix is.
• I can use words in sentences with the suffix -ous.
• I can apply spelling rules to help me spell a range of words which have the suffix -ous.
Introductory Activity
Adding Suffixes Beginning with Vowel letters
A suffix is a group of letters used at the end of one word to turn it into another word.
= useless
= useful
use + less
use + ful
Like this:full of
without
ful
less
Adding Suffixes Beginning with Vowel letters
A suffix is added to the end of a root - which is either a whole word or part of a word to form a new word.
= famous
= victorious
fame + ous
victory + ous
Like this:
possessing or full of
-ous
Adding Suffixes Beginning with Vowel letters
Sometimes you can clearly tell what the root word is so we follow the usual rules for adding suffixes beginning with vowel letters.
Use the following slides to help with these rules.
Adding Suffixes Beginning with Vowel letters
The -e at the end of a root word is dropped before adding any suffix beginning with a vowel letter.
= carnivorouscarnivore + ous
Like this:
Adding Suffixes Beginning with Vowel letters
When a word ends in a consonant and y, change the y to i before the suffix -ous is added.
= victoriousvictory + ous
Like this:
Adding Suffixes Beginning with Vowel letters
When a word ends with a vowel and y keep the y.
= joyousjoy + ous
Like this:
Adding Suffixes Beginning with Vowel letters
If none of the other rules apply we just add -ous onto the ending.
= poisonous
= mountainous
poison + ous
mountain + ous
Like this:
Tricky Exceptions to the Rule
Sometimes we need to apply some additional rules.
Use the following information to help with these rules.
-our is changed to -or before -ous is added.
humour
glamour
vigour
humorous
glamorous
vigorous
A final e of the root word must be kept if the words
ends in ge.
courage
outrage
courageous
outrageous
Walking Through the Jungle
glorious
glory
Walking Through the Jungle
famous
fame
Walking Through the Jungle
vigorous
vigour
Walking Through the Jungle
outrageous
outrage
Walking Through the Jungle
furious
fury
Spot the Suffix
Use your reading book or a topic book and the Spot the Suffix Activity Sheet to find examples of words with the suffix -ous. Further explore how to spell new words when the suffix -ous is added.
Mini Test
Use all of the information you have learned and practised about the suffix -ous.
Work on your own to complete the Mini Test.