英语untill引导从句的问题Everytimehewantedtocomeintothegardenhewouldbarkuntilsomeoneopenedthegate.（新概念259课）opened是过去式Theyoungmandidnotwakeupuntilthebedhadstrucktheground（新概念249课

Question

英语 untill 引导从句的问题
Every time he wanted to come into the garden he would bark until someone opened the gate.（新概念2 59课）
opened 是过去式
The young man did not wake up until the bed had struck the ground（新概念2 49课）
had struck 是完成时
请问untill后面 用过去式和完成时 区别在那里
或者直接点
he would bark until someone opened the gate
he would bark until someone have opened the gate 的区别

Answer 1

The young man did not wake up until the bed had struck the ground.
是 not …… until…… 句型,表示直到……才……的意思,the bed had struck the ground 的动作在wake up的动作之前,wake up是过去式 所以had struck 是完成时
Every time he wanted to come into the garden he would bark until someone opened the gate.是说他会叫 直到到有人开门（叫到有人开门）
用过去式是要与前面的时态（ he wanted to come into the garden ）一致