Grammar Detective Worksheet
Grammar Detective Academy
Part 1: Case Files #1 – #3
Name:
Date:
N
Noun Person, animal, place, or thing
V
Verb Action word (what someone does)
A
Adjective Describing word (tells what kind)
Detective Mission: Each sentence has 1 noun, 1 verb, and 1 adjective. Read each sentence, find each clue word, and write it in the matching evidence box.
Case File #1 Goal: Find 1 Noun • 1 Verb • 1 Adjective
"The playful dog ran."
Noun (1) Animal/Thing
Verb (1) Action
Adjective (1) Describes
Case File #2 Goal: Find 1 Noun • 1 Verb • 1 Adjective
"A green frog jumped."
Noun (1) Animal/Thing
Verb (1) Action
Adjective (1) Describes
Case File #3 Goal: Find 1 Noun • 1 Verb • 1 Adjective
"The quiet cat slept."
Noun (1) Animal/Thing
Verb (1) Action
Adjective (1) Describes
Part 1 Checkpoint Page 1 Targets: 3 nouns, 3 verbs, 3 adjectives
Nouns (3) Verbs (3) Adjectives (3)
Grammar Detective Academy
Part 2: Case Files #4 – #6
Name:
Score:
N
Noun Person, animal, place, or thing
V
Verb Action word (what someone does)
A
Adjective Describing word (tells what kind)
Detective Mission: Solve 3 more cases! Read each sentence, find the 1 noun, 1 verb, and 1 adjective, and write them below.
Case File #4 Goal: Find 1 Noun • 1 Verb • 1 Adjective
"The sweet bird sang."
Noun (1) Animal/Thing
Verb (1) Action
Adjective (1) Describes
Case File #5 Goal: Find 1 Noun • 1 Verb • 1 Adjective
"A shiny star glowed."
Noun (1) Animal/Thing
Verb (1) Action
Adjective (1) Describes
Case File #6 Goal: Find 1 Noun • 1 Verb • 1 Adjective
"The fast rabbit hopped."
Noun (1) Animal/Thing
Verb (1) Action
Adjective (1) Describes
Master Detective Badge Earned! All 6 case files solved across both pages
Nouns (3) Verbs (3) Adjectives (3)
Grammar Detective Answer Key
Teacher Answer Key
Master Key
Grammar Detective Academy • Grade 3 Grammar (CCSS L.3.1.A)
Total Points 18 Points (1 pt each)
N Noun = Blue (6 total)
V Verb = Green (6 total)
A Adjective = Yellow (6 total)
Page 1 Solutions (Cases 1–3) 9 Points
Case #1 "The playful dog ran."
Noun dog
Verb ran
Adjective playful
Case #2 "A green frog jumped."
Noun frog
Verb jumped
Adjective green
Case #3 "The quiet cat slept."
Noun cat
Verb slept
Adjective quiet
Page 2 Solutions (Cases 4–6) 9 Points
Case #4 "The sweet bird sang."
Noun bird
Verb sang
Adjective sweet
Case #5 "A shiny star glowed."
Noun star
Verb glowed
Adjective shiny
Case #6 "The fast rabbit hopped."
Noun rabbit
Verb hopped
Adjective fast
Common 3rd Grade Misconceptions
- Articles ("The", "A"): Students may classify them as adjectives. Clarify that articles are special noun markers, not descriptive clue words.
- Past Tense Verbs: Irregular past tense verbs like "ran", "slept", and "sang" may need reinforcement as action words.
Quick Scaffolding & Extension
- Support: Have students physically act out the verb first to isolate the action before finding the noun.
- Extension: Challenge early finishers to replace the adjective with a new synonym (e.g., change "playful" to "energetic").
Proficiency Scale:
16–18 pts: Master Sleuth 13–15 pts: Junior Detective Below 13 pts: Needs Practice