In the third year, children use language in increasingly sophisticated ways. This includes making sentences that use articles (“a” or “the”), auxiliary verbs (“can,” “may,” or “do”), and other grammatical forms (adding “-ed” to talk in the past tense or “-ing” to describe the present progressive, as in “I am eating”).
References:
Hoff-Ginsberg, E. (1997). Language development. Pacific Grove, CA: Brooks/ Cole.
