Base Words and Endings
Remind students that endings can be added to base words. Write the words swim/
swimming, save/saved, and happy/happier/happiest.
- Some base words change when the endings -ed, -ing, -er, and -est are added. How
did swim change when -ing was added? (The final consonant was doubled.)
- How did save change when -ed was added? (The final e was dropped.)
- How did happy change when -er and -est were added? (The y was changed to i.)
MODEL Some words with endings are easier to read when I figure out what the
base word is. Sometimes I can just cover the ending to find the base word, but
sometimes the base word was changed to add the ending. That's when
I remember the rules for adding endings. If a word ends with one consonant
and one vowel, double the final consonant. If a word ends with silent e, drop the e.
If a word ends with y, change y to i before adding -ed, -er, or -est.
Model blending swimming, saved, happier, and happiest. Then have students blend the
words with you.
DECODE LONGER WORDS Write these words. Have students read them and
tell what change, if any, was made when the ending was added.
| hottest |
luckier |
believing |
forgetting |
| worried |
beginning |
decided |
drier |
READ WORDS IN CONTEXT Write these sentences. Have individuals read
them, point out the words with endings, and name and spell the base words.
| We are planning on taking the sailboat out as soon as it gets windier. |
| The cutest kitten is the one with the fuzziest fur. |
| Jon and Jill raced to the fence and then hopped back on one foot. |
To assess, observe whether students connect the words with endings with the
base words.
Review Word Parts

PLURALS
CONNECT Write this sentence: Dragonflies have large wings.
- We studied plural words formed by adding -s or -es or by changing y to i and
adding -es.
- Read the sentence to yourself. Raise your hand when you know which words are plural. (Dragonflies, wings)
- How do you form the plural of wing? (Add -s.)
- How do you form the plural of dragonfly? (Change the y to i and add -es.)
Continue in the same way with the sentence I love sandy beaches and blue skies.
DECODE LONGER WORDS Have individuals read the following words. Provide
help blending the words as needed.
| parties |
pickaxes |
balloons |
batches |
| quizzes |
baseballs |
fusses |
paintbrushes |
| foxes |
goldfinches |
stories |
details |
READ WORDS IN CONTEXT Have students read these sentences. Then, to
check meaning, have them name the singular form of each underlined
word and use the singular and plural words in sentences.
| Some animal babies ride in pouches. |
| The twins got new dresses and new watches for their birthday. |
| The big boxes were filled with surprises. |
| Flashes of lightning lit up the clouds. |
To assess, note how well students read the plural words.