At age 3, children typically start to use which of the following?

At age 3, children typically begin to use pronouns, which signifies an important stage in their language development. This is the age when children start to grasp that language can represent their thoughts and feelings, and pronouns facilitate this by allowing them to refer to themselves and others in conversation. Using pronouns like "I," "you," "me," "he," and "she" shows an understanding of perspective and social interactions, which is fundamental for their communication skills.

While children might also begin to use adjectives and simple sentences at this age, the distinction of using pronouns represents a more significant developmental leap in their ability to engage in conversations and express relationships with others. Additionally, complex sentences and transitional verbs typically come later in development, usually around ages 4 to 5 or beyond, when children are more adept at constructing more sophisticated language structures.