下面这个句子的谓语是什么,Sandy had left for school.它的谓语是had left，还是had left for?

had left for

leave for
到.去, 出发前往

He has left for Washington.
他已经去华盛顿了。
He suggested we leave for Beijing.
他建议我们立刻去北京。

leave ...(somewhere) for... (somewhere),必须指明离开的地方和达到的地方。
He left shanghai for hangzhou.
他离开上海去杭州了。

had left

had left for

had left
for 引导补语
完整的句子是: Sandy had left(home)for school.

had left