1. Every time he wanted to come into the garden he would bark until someone opened the gate.
每当它想到花园里来时，便汪汪叫个不停，直到有人把门打开。
真题检验：would do + until / till...
The crazy fans patiently for two hours, and they would wait till the movie star arrived.
A. were waiting B. had been waiting C. had waited D. would wait
答案：选B
分析：根据“they would wait...”可知，他们当时还在等，用过去完成进行时强调“等待” 这一动作从过去开始，一直延续到过去，而且还要延续下去。
翻译：疯狂的影迷们已经耐心地等了两个小时了，他们还将等下去，一直等到他们喜爱 的影星出现为止。
2. Then he sits and barks until someone lets him out.
然后他就坐下汪汪叫起来，直到有人来把它放出去。
知识点：then加until引导的时间状语从句，旨在突出时间上的顺延。
例：Then I held on the rope until someone dragged me up the cliff.
然后我抓紧绳子，直到有人把我从悬崖上拉了上去。
3. Our dog，Rex, used to sit outside our front gate and bark.
我家的狗，雷克斯，过去经常坐在大门外汪汪叫。
知识点：used to do表示过去常常做，现在不再做了。
例：My cat used to eat fish and now she likes eating cat food.
我家的猫以前是吃鱼的，但是现在她改吃猫粮了。
