there used to have a temple at the foot of the hill.(改错)

问题描述:

there used to have a temple at the foot of the hill.(改错)
have 改 has
我怎么也想不明白used to 后不跟动词原形,而是跟单三.

把have改为be ,there be 表示存在关系.used to,be going to 等可以放在there be句型的be前面.
used to 过去(经常).
这句话意思是,山脚下原来有一座(寺)庙.