Final answer:
The two phases of syntactic development for children are the one-word stage and the two-word stage. In the one-word stage, children use single-word utterances to convey meaning. In the two-word stage, children start combining words to form simple sentences.
Step-by-step explanation:
The two phases of syntactic development for children are the one-word stage and the two-word stage. In the one-word stage, children use single-word utterances to convey meaning. They have a limited vocabulary but can express their needs and identify familiar objects. In the two-word stage, children start combining words to form simple sentences, often following a subject-verb pattern. For example, they might say "Mommy go" to express that their mother is leaving.