Grammaropolis
The Sentence Factory

Subject & Predicate

Every sentence has two parts: who or what it is about, and what they do.

Start the lesson →

Preview how it deepens, Grades 1 through 8.

S + V See it · tap a half
Try it on the line

Build one yourself.

Pick one chip at each station and snap them together. The Mayor inspects the finished sentence, a quick taste of how the parts combine.

1 · Nelson's office · the subject

2 · Vinny's stage · the predicate

3 · The Mayor inspects
Pick one from each side.
✓ Complete thought · approved
Keep going in the Arcade · free, plays daily
Sentence Surgeon · revising sentences
Sentence Surgeon

A change order drops: make it plural, give it an adverb, swap in a pronoun. Re-tool the sentence and roll it back onto the line.

Play Sentence Surgeon →
Garbage Sentences · syntax vs. meaning
Garbage Sentences

Slang builds a sentence that follows every rule of grammar and still means nonsense. Catch which rule he really broke, and let the Mayor judge.

Play Garbage Sentences →
Watch for

Half a sentence is a fragment.

Fragment

All subject, no predicate. We never find out what the dog does, so it is not a complete thought yet. This is the mistake the Factory was built to catch.

Complete

Add a predicate and the thought finishes. Now it can leave the line.

The crew on this station

The characters host. The sentence is the star.

Nelson portrait
Nelson
introduces the subject
Vinny portrait
Vinny
drives the predicate
The Mayor portrait
The Mayor
inspects the sentence
What you'll learn

The same concept, deeper every grade.

Subject & Predicate runs the length of the Factory, Grades 1 through 8. The lesson meets the standard at each grade, across all four frameworks.

Grade 1 Every sentence has two parts: who or what it is about, and what they do. CCSS L.1.1.J
Grade 2 Every sentence has two parts: who or what it is about, and what they do. CCSS L.2.1.F
Grade 3 Every sentence has two halves: the complete subject and the complete predicate. CCSS L.3.1.A · CCSS L.3.1.I
Grade 4 Every sentence has two halves: the complete subject and the complete predicate. CCSS L.4.1.F
Grade 5 Every sentence has two halves: the complete subject and the complete predicate. CCSS L.5.1
Grade 6 Every sentence divides into a complete subject and a complete predicate. CCSS L.6.1
Grade 7 Every sentence divides into a complete subject and a complete predicate. CCSS L.7.1
Grade 8 Every sentence divides into a complete subject and a complete predicate. CCSS L.8.1