Word parts
Suffixes
A suffix is a word part added to the end: jumped, jumping, jumps, quickly, hopeful. Recognising the suffix lets a reader strip it off, read the base word they already know, and put it back.
The -ed ending is the one worth explicit time. It has three pronunciations, as in jumped, landed and played, and readers who expect one of them stall on the other two.
Patterns and example words
Every word below is from the word list Cody generates from, not a hand-picked sample. The count is how many words in that list carry the pattern.
suffix -ed
4,564 wordswilled liked timed worked used looked wanted needed
suffix -ing
4,312 wordsbeing having doing willing saying going knowing liking
suffix -s
17,826 wordsbeings its yours theirs ours does hers sayings
suffix -es
647 wordsuses courses houses cases businesses increases closes processes
suffix -er
7,893 wordsnewer longer greater littler another older later higher
suffix -est
307 wordsnewest longest greatest littlest oldest latest highest kindest
suffix -ly
1,062 wordsactually probably finally likely certainly particularly simply recently
suffix -ful
121 wordsbeautiful successful useful wonderful powerful careful helpful grateful
suffix -less
181 wordsunless regardless clueless countless endless fearless flawless harmless
suffix -ness
381 wordsbusiness witness illness awareness weakness happiness darkness awfulness
suffix -ment
297 wordsgovernment development management environment department statement agreement movement
suffix -y
1,414 wordsstudy early money today storey ready okay daily
Curricula that teach this
Cody generates material against the scope and sequence you already teach. This skill appears in Cody Curriculum, UFLI Inspired.
Common questions
Why does -ed sound different in jumped, landed and played?
Because the sound before it decides. After an unvoiced sound it says /t/, after d or t it says /id/, and after a voiced sound it says /d/.
Make a decodable story for this skill
Cody generates stories, word lists and worksheets constrained to the patterns a student has already been taught, so practice on suffixes does not smuggle in something they have not met yet.