i had to drive two blocks before i spotted a place to park the car

题目

i had to drive two blocks before i spotted a place to park the car
这句什么意思
为什么 had 后面要加 to? 什么时候能不加

答案

我开了两个街区才找到一个停车位.had to 是 have to 的过去时.have to 是不得不的意思,表达了并非本人情愿的意思.比如：I had to work till 3am last night.我昨天晚上不得不工作到凌晨3点.She has to take medicine...