he is older than me.她比我年老。这是带有形容词比较级的句子，表示两者之间的比较。句中older是形容词old的比较级，同义句要将主语宾语调换位置，然后用older的反义词younger(年轻的)，这样这道题的答案就是I am younger than she.我比他年轻。
he is older than me改为同义句
同义句：I am younger than him. 1.这是一个同义句的转换。
2.在第一句中"he is older than me"，"he"表示他比我年龄大，而在同义句中"i am younger than him"，"i"表示我比他年龄小。
3.两个句子意思相同，只是表述方式不同而已。
he is older than me改为同义句
改为同义句是i am younger than him.