Could you, right now, spot a missing end mark, name a semicolon, and
point to the verb in The kettle whistled? This section is a short
checkpoint with nothing new in it. It checks five ideas the next
chapter builds on: the read-aloud test, the punctuation marks, sentence
boundaries, noun and verb word jobs, and proofreader's marks (frag).
A gym trainer takes a "before" measurement on your first day. You can't fail it, because you haven't started training yet. The number is there so that week eight can be compared to something real instead of a guess. This section is that first-day measurement. Nothing here gets a pass or fail, and nothing you do here counts against you later.
"Where are you starting from?" is the one question a baseline check answers before instruction begins. What can you already do, right now, without help? That way, progress later in the course can be measured against where you started, not against an assumed starting point that may not match your own. A baseline check is not a test in the pass-or-fail sense. There is no score attached. Nothing here is used to place you in a track or gate what comes next. It exists purely as a comparison point. If a later chapter feels hard, this section tells you why. Maybe the ground underneath it was shaky. Or maybe that chapter is just hard.
From here on, the course assumes you can do these five things:
- Say a group of words out loud and sense whether it sounds finished.
- Name the common punctuation marks on sight.
- Recognize whether a sentence has both its capital-letter start and its end-mark finish.
- Point to the noun and the verb in a short, plain sentence.
- Recognize the marks
frag,r.o.,c.s., andagr.
If one of those felt shaky, go back to its section (they run in this order) before moving on. If all five felt solid, you're ready.
Worked example
All five checks on one sentence: βthe kettle whistledβ
-
1
Take the words from the top of this section, written the way a quick text might be: the kettle whistled. Run each check in order.
-
2
Check 1, the read-aloud test. Say it by itself and stop. It sounds finished. Nothing is missing, so it's a complete thought.
-
3
Check 2, the marks. There aren't any. Check 3, the boundary signals. There's no capital at the start and no end mark at the finish. Both signals are missing.
-
4
Check 4, word jobs. It's about the kettle, which names a thing: the noun. The kettle whistled, which is the action: the verb.
-
5a complete thought can still be missing both of its signals.
Check 5, the grader's marks. A grader would write
capfor the missing capital andpuncfor the missing end mark. Notfrag, because check 1 passed. Fixed: The kettle whistled.a complete thought can still be missing both of its signals.
Mixed review: word jobs
One more pass -- label each word as a noun or a verb.
Loading interactive…
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
What this task checks
Structure checked automatically. Whether your ideas are convincing isn't graded, so reread with the checklist.
The compiler says
A model answer
Correct answer
Also accepted:
Why
Why
Mixed review: sentence boundaries
Click the first word and the last word of the complete sentence below.
Loading interactive…
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
What this task checks
Structure checked automatically. Whether your ideas are convincing isn't graded, so reread with the checklist.
The compiler says
A model answer
Correct answer
Also accepted:
Why
Why
Check your understanding (counts toward your progress)
In "The artist painted a mural," which word is the verb?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
"Artist" names who did it, the subject, not the action.
"Mural" names what got painted, not the action itself.
Why
"Painted" is the action the artist performed, the verb.
Find the word that names the action being performed, not who did it or what got acted on.
A sentence has two independent clauses joined by only a comma, nothing else. Which mark applies?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
"r.o." is for clauses joined with NO punctuation at all, not a comma.
"frag" flags an incomplete sentence, not two joined clauses.
"agr" flags a subject-verb mismatch, or a mismatch between a stand-in word and the noun it points back to, unrelated to how clauses are joined.
Why
Two independent clauses joined by only a comma is a comma splice, c.s.
Ask what punctuation, if any, actually sits between the two clauses here.
This isn't a total absence of punctuation; there's one mark doing too small a job.
This run-on packs two complete thoughts together. Click the first word and the last word of the SECOND one.
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
What this task checks
Structure checked automatically. Whether your ideas are convincing isn't graded, so reread with the checklist.
The compiler says
A model answer
Why
"The lights flickered" finishes at "flickered." A second complete thought starts at "the," naming the power and saying it finally failed, with nothing marking the seam.
Correct answer
Also accepted:
Why
Read it aloud and find the exact word where the first complete thought ends.
Everything from that seam onward, through the very last word, belongs to the second thought.
Which one sounds finished when read aloud?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
"Whenever" sets up a moment the sentence never describes.
This never names who is ending anything.
"Because" sets up a reason whose result never arrives.
Why
"The show ends at ten" names a subject and finishes the thought. The other three all leave you waiting for more.
Read each one aloud and notice which words, like "whenever" or "because," leave you expecting more.
In "She writes novels," which word is the verb?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
She names who is doing something. It stands in for a name, so it isn't the verb.
Novels names what she writes. It's a naming word, not the action.
Why
"Writes" is the action: the verb. "She" is the subject, standing in for a name. "Novels" names what she writes.
Practice: One pass through all five ideas (6 problems Β· doesn’t affect your progress)
Read each option in your head. Which one doesn't leave you waiting for anything more?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
No one is doing the jumping here. Who jumped over the fence?
Unless at the front leaves you waiting: unless we leave now, what happens?
This only tells you when. Nobody does anything, so it sounds unfinished.
Why
Only this one names a clear subject (the chef) and says something complete about it, with nothing left dangling.
The chef prepared a five-course meal.
You want to end a sentence that's asking something. Which punctuation mark do you reach for?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
A period ends a plain statement, not a question.
An exclamation point ends a sentence said with strong feeling, not one that asks something.
A comma never ends a sentence; it separates parts inside one.
Why
A question mark (?) ends a sentence that asks something. A period (.) ends a statement; an exclamation point (!) ends a sentence said with strong feeling.
question mark
Which version has BOTH boundary signals in place?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
The period is there, but look at the first letter. A lowercase "t" means the start signal is missing.
It starts with a capital, but look at the finish. There's no end mark, so a reader can't tell where it stops.
This one is missing both: no capital at the start and no end mark at the finish.
Why
Only "The train pulled in early." has a capital letter on its first word AND an end mark on its last. Each of the other three is missing at least one of the two signals.
The train pulled in early.
In "The chef bakes bread," which word is the verb?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
Chef names who is doing the baking. That's the noun, not the verb.
Bread names what gets baked. It's a naming word, not the action.
Why
"Bakes" is the action β the verb. "Chef" is the subject (who's doing it); "bread" names what's baked.
bakes
Your grader marks a sentence "agr." What kind of mismatch does that flag?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
A misspelled word gets sp.
A missing comma gets punc.
A sentence that's hard to follow gets awk.
Why
"agr" is short for agreement β the subject and verb (or a stand-in word and the noun it points back to) don't match in number, like "The dogs barks."
A subject and verb that don't match in number
A sentence has a capital letter and a period, but a grader still marks it "frag." What does that tell you?
Right on try — credit. Right — the answer had already been shown, so no credit this time. Next try is worth Answer shown after three tries — this one no longer earns credit. You chose to see the answer — this one earns no credit.
A capital and a period can sit on words that still don't add up to a finished thought, so the grader has a point.
Frag is about the words, not the marks. It means the group of words isn't a complete sentence.
Why
Capitalization and end punctuation are a claim about where a sentence starts and stops. They say nothing about whether the words inside actually add up to a complete thought β that's a separate check, and this one failed it.
The two visual boundary signals don't guarantee the words form a complete thought.
Who uses this
Placement testing and hiring
A college writing placement test does what this checkpoint does. It measures where you start so you land in the right course, not one that is too easy or too far ahead. A job application works the same way, less formally: your cover letter is a writing sample, read before anyone meets you. In both cases, knowing where you stand lets you pick the next step instead of guessing.