Synonyms and Antonyms — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
The cautious skateboarder zoomed down the steep hill without wearing a helmet.
Corrected: The reckless skateboarder zoomed down the steep hill without wearing a helmet.
A 'cautious' person is careful and avoids risk, so cautious does not match someone speeding without a helmet. The antonym 'reckless' means careless about danger and is the precise Grade 4 word for this behavior.
2. Fix the sentence:
The stingy millionaire gave free meals to every hungry family in the whole town.
Corrected: The generous millionaire gave free meals to every hungry family in the whole town.
'Stingy' means unwilling to share, which contradicts giving free meals to everyone. The antonym 'generous' means freely giving and matches the kind action described in this Grade 4 sentence.
3. Fix the sentence:
The pessimistic coach told the team they would surely win every single game this season.
Corrected: The optimistic coach told the team they would surely win every single game this season.
A 'pessimistic' coach would expect losses, not wins. The antonym 'optimistic' means hopeful and expecting good results, so it is the precise Grade 4 word that matches the cheerful prediction in the sentence.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A nuanced antonym for the word 'courageous' that describes someone who runs from danger is cowardly.
'Courageous' means brave and willing to face danger, while 'cowardly' means fearful and unwilling to act. Grade 4 students learn this antonym pair to expand beyond simple opposites like brave and scared.
2. An antonym for 'cautious' that means acting without thinking about the danger is reckless.
'Cautious' means careful, while 'reckless' means careless about consequences. Knowing this nuanced antonym pair helps Grade 4 writers describe behavior with precision in their stories.
3. If a friend is the opposite of 'generous' with snacks, you could call that friend stingy.
'Generous' people share freely, while 'stingy' people hold tightly to what they have. Grade 4 readers add this precise antonym to their vocabulary as part of CCSS L.4.5c work.
4. An antonym for 'optimistic' that describes a person who expects the worst outcome is pessimistic.
'Optimistic' means hopeful, while 'pessimistic' means gloomy and expecting bad results. Grade 4 students use these nuanced antonyms to describe characters' attitudes in stories and essays.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Pick one antonym pair from this worksheet (such as cautious/reckless or generous/stingy) and write a Grade 4 sentence using both words to show their opposite shades of meaning.
Sample answer: I picked the antonym pair cautious and reckless. Sentence: My cautious sister checked both ways twice before crossing the street, but her reckless friend ran across without even looking, almost getting hit by a passing delivery truck on Grade 4 field-trip day.
Using antonyms in a single sentence highlights their opposite shades of meaning. This Grade 4 skill supports CCSS L.4.5c by showing precise word choice in original writing.
2. Explain in your own words why 'cowardly' is a more precise antonym for 'courageous' than the simpler word 'scared'. Use Grade 4 vocabulary like 'shade of meaning' or 'precise'.
Sample answer: Cowardly is more precise because it describes a person who refuses to act bravely, not just someone who feels scared. Many courageous people feel scared but still act, so scared is not a true antonym. Cowardly captures the exact shade of meaning opposite to courageous, which is what Grade 4 writers need.
Distinguishing 'scared' from 'cowardly' shows Grade 4 understanding of nuanced shades of meaning, a core CCSS L.4.5c skill that goes beyond simple opposites.