为什么用to

来源：百度知道 编辑：UC知道 时间：2024/06/03 18:08:41
Aonther appointment is the slow progress in abolishing "staggered' boards－－－ones where only one-third of the directors are up for re-election each year, to three year terms.句中为什么用to，（意思是”在其三年任期内”）

是up带的这个to

UP TO THREE YEARS

for re-election each year, 只是个插入句。

举个简单的例子：
She said, with a knife in her hand, that he was the murderer.

said 后面是that. with a knife in her hand,是个状态插入句。明白了吗？