Question

句型转换

He started dancing at the age of four. (改为同义句)

He started dancing ________ he was________ ________ ________.

Answer 1

答案：when;four;years;old
解析：

at the age of意为“在……岁时”，其后跟年龄数，相当于when引导的时间状语从句。句意为“他从4岁时就开始跳舞了”。