K.G.
i am a speech pathology student and here are what the norms are, remember it can go one way or another by a couple months, especilly bi-lingual children
Stage I 9-18 Mos. MLU 1.0 – 1.5
One word utterances. Labeling, then action words emerge. There is a communicative intent in which Holophrases are used – one word which represents a complete sentence or thought. The child labels or comments about objects, uses requests, greetings, protests, and repeats words uttered by caregiver.
The child can point to objects named, comprehends about 50 words, can respond to simple yes/no queries with head nods or gestures. Verbal turn taking is established at this stage.
Stage II 18-24 Mos. MLU 1.5 - 2.0
Two word phrases: Agent-action: Ted read
Action-object: Push truck
Attention: See ball
Possessive: Ted truck
Denial: No eat
Question formation using intonation. No morphemes used at this stage.
The child has a 50-word vocabulary and refers to himself by name. He uses my and mine. The child comprehends prepositions: in, on, under, and can follow simple phrases: get the keys, open the door, as well as respond to simple Where queries when gestures are used.
Stage III 24-36 Mos. MLU 3.0 – 4.0
3 to 4 word utterances.
Morphological endings: ing, s, “s appear
Past tense irregular used with overgeneralization of grammatical rules, e.g., 2 feets. Present progressive without use of “is-verbing”, e.g., mommy pushing truck. The child is making his wants known with words, rather than with actions (crying, whining, etc.).
There is a large increase in vocabulary at approx. 30 months. The child uses polite words, please and thanks. There is an increase in the use of questions, (e.g., what’s that? Where mommy go? Where my shoe? Why?)
The child responds to one and two-stage commands as well as queries using what and where without gestures. The child can point to pictures of common objects named. He can understand negation: No, don’t, can’t, not.
Stage IV 3+ years MLU 3.0 +
3 to 6 word sentences.
The child uses embedding of one sentence into the semantic role of another sentence at this stage which dramatically increases his MLU. He can sustain a topic of interest and can maintain a conversation by asking queries, especially Why? He uses word pairs like: more and less, and dimensions of time like: before and after. He can repeat at least one nursery rhyme and can sing a short song. Speech is understandable to strangers, but there are some articulation errors.
The child is understanding cause and effect like: if/then, why/because. He can pretend and roll play and understands when told: let’s pretend. He develops the metalinguistic ability to think about language and comment on it.
Stage V Communicative Competence
By age 7 knowledge of the rules of grammar are mastered. (Some of the irregular forms linger, however). The child knows who can say what to whom and when one can say it. (It is even thought that children may have all the rules by age 5.)