Unit 34 - Adding suffixes to longer words

think back to spelling teaching When you add a suffix to a root word, you sometimes need to double the last letter of the root word. In Unit 9 you learnt the rules for words of one syllable:

If you add a vowel suffix to a root word with one short vowel followed by only one consonant, you must double that consonant. This stops the short vowel from being changed to a long sound.


To help you remember this rule, think of the second vowel as an invader. He is trying to attack the first vowel and make it change its ways. If he can get near enough, he will make it say its long sound.

Help adding suffixes to longer English words
Here, there is a strong wall of two consonants. This will protect the short vowel from attack. The invader can't get close, so the first vowel can carry on as before.
Help adding suffixes to longer English words

Some more examples:

grab + ed = grabbed hot + est = hottest

dig + er = digger mud + y = muddy

Teaching point - learning to spell THE DOUBLING RULE FOR LONGER WORDS:
This is slightly different from the words above. With longer words, you only need to double the consonant if the syllable just before the suffix is the stressed syllable.

To understand this rule, you must be able to work out which is the stressed syllable in a word. Think back to this work from Unit 24:

think back to spelling teaching Stressed and unstressed syllables

Help adding suffixes to longer English words Old science-fiction films sometimes featured 'robot' speech, in which each syllable was pronounced with exactly the same strength, or stress.

Hear examples of 'robot' speech.

In normal speech, longer words have one syllable which sounds stronger than the rest. This is called the stressed syllable. Read these words aloud in your normal voice:

Help adding suffixes to longer English words Help adding suffixes to longer English words Help adding suffixes to longer English words
elephant gorilla kangaroo

In each word the stressed syllable is in orange. In that syllable you can hear the vowel sound very clearly.

Test yourself in spotting the stressed syllable. Each word has been split into two syllables. Decide which is the stressed syllable and type it in the box.


Which is the stressed syllable?


Type it here

number = num + ber
mistake = mis + take
invade = in + vade
forget = for + get
open = o + pen
apart = a + part
guitar = gui + tar
prepare = pre + pare
often = of + ten
pretend = pre + tend


 


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Unit 34: Adding suffixes to longer words

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