reach和arrive谁可以加年龄

reach后面可以直接加年龄

例句:He reaches eighty years old.

reach它是不及物动词，后面直接地点就行，不用介词，例如reach there/here/home。

They reached there yesterday.

arrive它也是到达的意思，大地点就用in，小地点就用at

She arrived in Beijing just now.

He arrived at home an hour ago.