Eight components, one position map
- Predicate — the engine of the sentence, usually a verb or verb phrase.
- Subject — who or what performs the action.
- Object — what the action acts on.
- Predicative — what follows a linking verb (be, become, look…).
- Object complement — completes the object by describing its state or identity.
- Attributive — modifies a noun: which one, what kind.
- Adverbial — modifies the action or the whole clause: when, where, how, why.
- Clause — a whole level analysed again by the same rules.
Four-step identification
- Find the predicate — the verb (with tense and modals). It is the hinge of the sentence.
- Find the subject — who performs it, usually before the verb.
- See what follows — transitive verb → object; linking verb → predicative; some verbs take two objects or an object complement.
- Hang the modifiers — decide whether the remainder modifies a noun (attributive) or the action/clause (adverbial); clauses get their own layer.
Three high-frequency mistakes
1. Which noun does the attributive modify?
Attributives can sit far from their noun. Have learners draw a line to the noun — in a 3D view the attributive hangs on the level of the noun it modifies, so the attachment is visible.
2. Does the adverbial modify the verb or the clause?
Front-position time and place adverbials often modify the whole clause; manner adverbials right after the verb usually modify the action. Test by moving it: if it can move to the front without changing meaning, it is probably clausal.
3. Is a clause a component?
Yes — a clause as a whole acts as a component (subject, object, attributive, adverbial clause). Teach learners to treat the clause as one big word first, decide its role in the main clause, then analyse inside it.
Making it stick
- Guess, then verify: learners state the backbone first, then run 3D analysis to check. Guess–verify beats being shown the answer.
- Spread the sentence out: components unfold along the axes, so “what hangs on what” is visible.
- Substitution drills: same skeleton, new subject, new object, new adverbial — structure stays, content changes.
- Build with blocks: assemble the target pattern from scratch; mistakes produce gentle hints instead of red marks.
The software steps are in How to read the 3D grammar coordinates.
FAQ
Attributive vs. adverbial in one question?
Ask: does it follow a noun or an action? Following a noun → attributive; following an action or the whole clause → adverbial.
Object complement vs. two objects?
Two objects answer “give whom what” and stand independently. An object complement says the object “is/becomes” something, so there is a be-relationship between object and complement.
Learners cannot find the backbone at all
Go back to step one and drill verb-finding only; then ask “who does it”. Backbone recognition speeds up within a few sessions.
Are long sentences a job for AI?
Everyday patterns work offline. For deeply nested clauses and non-finite structures, AI analysis returns a multi-level structure tree that saves a lot of explanation time.
Make components visible
3D grammar coordinates unfold the eight roles along axes — clearer than whiteboard diagrams when projected.