Developmental Milestones for Speech and Language
-understands spatial concepts such as "behind," "next to"
-understands complex questions
-speech is understandable but makes mistakes in pronouncing long, difficult, or complex words such as "hippopotamus"
-says about 200 to 300 different words
-uses some irregular past tense verbs such as "ran," "fell"
-describe how to do things, such as painting a picture
-lists items that belong in a category, such as animals and vehicles
-answers "why" questions
-understands more than 2,000 words
-understands time sequences
(what happened first, second, third, etc.)
-carries out a set of three directions
-engages in conversation
-sentences can be eight or more words in length
-uses compound and complex sentences
Developmental information from the National Institute on Deafness and other Communciation Disorders