Lesson 08 · English · Introductory commas
Step 1 of 4
Find the wrong step

Your lessonIntroductory commasWarm-up
The Midnight Museum Headline
The school paper is reporting a surprising sound from the museum after everyone left.
- Opening detail
- After the museum closed
- Main event
- the dinosaur sneezed
Your question
Which sentence makes the timing easiest to read?
Lumi’s answer: “After the museum closed the dinosaur sneezed.”
1
Step 1 of 4
Find the wrong step

Find where the reasoning first breaks
Start with Step 1 and move downward. Choose the first line that stops making sense.
Later lines may be wrong too. Pick the first mistake.
Lumi’s work
These lines form one solution. Read them from top to bottom.
- 1
The opening words tell us when the event happened.
- 2
The main event is: the dinosaur sneezed.
- 3
Opening information never needs a comma before the main event.
- 4
Write: After the museum closed the dinosaur sneezed.