was born
（过去式）出生
started to speak
（过去式）开始说话
learned to walk
（过去式）学走路
learned to ride a bike
（过去式）学骑自行车
went to kindergarten
（过去式）上幼儿园
went to school
（过去式）上学
learned to swim
（过去式）学游泳
fifteenth（15th)
第十五
started to buy things
（过去式）开始学买东西
started to study Englsih
（过去式）开始学英语