2个月(Infant looking, vocalizing…)
2个月(Father and infant, mutual gaze, cooing)
3个月(Mother and infant, mutual gaze, cooing)
4个月(Mother and infant looking, vocalizing)
5个月(Infant vocalizing)
7个月(Intentional action)
9个月(Babbling)
11个月(Intentional communication)
13个月(Single-word utterances and jargon)
15个月(Single-word utterances)
2岁(Single-word and telegraphic utterances)
2岁半(Single-word and telegraphic utterances)
2岁半(Telegraphic utterances)
3岁(Phonological processes)
4岁(Basic sentences, early infinitive)
5岁(Basic sentences, coordination)
6岁(Basic sentences, complex syntax)
6岁(Basic sentences, complex syntax)
以上视频资源均来自:https://msu.edu/~casby/langdevidcomp/