Investigating spelling rules for the suffix sion What

Investigating spelling rules for the suffix -sion

What is a suffix? • A suffix is a group of letters that comes at the end of a word. • They change the meaning of words. • Knowing the rules for suffixes can help us to understand spell words better.

Suffixes • The makes a ‘shun’ sound. • Certain rules are helpful when choosing the correct ending to put at the end of a root word.

Suffix -sion • The suffix –sion means ‘the state of’. For example, conclusion means the ‘result of concluding’. • There about 50 words in common use that end in –sion. • Most verbs change their endings in order to add the suffix.

Suffix -sion is used when the root word ends in se or –d, -de, -l, -r, -s or -t. precise + sion extend + sion precise exten d Can you see what is happening ? If a word ends in se just remove the se and add –sion. If the word ends in –d, -de, -l, -r, -s or -t you must drop the letter and add ‘sion’. sion

Have a go at adding ‘sion’ to these words in your books. tense tension expand invade confuse explode precise expansion invasion confusion explosion precision Finished? Put some of these words into sentences in your books. Did you get them right ? Well done !

Exceptions • With any spelling rules there always exceptions and some words that end in ‘shun’ just need to be learnt. Always check with a dictionary when you are unsure.