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Year 4 - English

Spelling words with the suffix -ous, including -ious and -eous

Verb and adjective suffixes

Unit Summary

In this unit, pupils learn spelling and grammar conventions associated with certain verb and adjective suffixes, like -ate, -en, -ify, -ise and -ous. Pupils will review and learn more examples of how the addition of a suffix can affect the grammar of a word, for example its word class or tense.

Lesson Summary

You will learn to spell words using -ious and -eous.

Key Notes

  • The suffix -ous often turns nouns into adjectives and often means 'full of'.
  • There are four key rules when adding the suffix -ous to a root word.
  • When you hear the 'ee' sound before -ous, the most likely spelling is an 'i', but it is sometimes an 'e'.
  • How to spell the curriculum words: learn, group and earth.

Vocabulary To Learn

  • root word: the base word from which other words are formed often by adding prefixes or suffixes
  • suffix: a letter or group of letters added to the end of a root word
  • pronunciation: the way a word is spoken
  • adjective: describes a noun

Common Mistakes To Avoid

  • You can hear the 'ee' in all words ending in -ious and -eous.

3 Quick Questions (With Answers)

1. Explain this English learning goal in two key points.

The suffix -ous often turns nouns into adjectives and often means 'full of'. There are four key rules when adding the suffix -ous to a root word.

2. Define this language term and use it in a sentence. 'root word'

the base word from which other words are formed often by adding prefixes or suffixes.

3. Correct this common English misunderstanding.

Mistake: You can hear the 'ee' in all words ending in -ious and -eous. Correction: You cannot hear the 'ee' in words ending -geous, like 'courageous' (the 'e' is making the 'soft g' sound) or words with 'xi' or 'ti'.

More Lessons In This Unit

Browse all guides in the Year 4 English guide library.