By around age three, George has ceased using null subjects, and has the following proportions for overt subject use: he uses full NP subjects 25% of the time, and pronominal subjects 75% of the time.

• 大约到了三岁，乔治开始减少使用空主语，而使用清楚主语的比例如下：他使用完整名词词组当主语占25%25，代名词当主语占75%25。