At that time I had been job-hunting for six months.
那时我找工作已经找了六个月了。
Particles of glass had been introduced into the baby food.
这种婴儿食品中被掺进了玻璃碎屑。
At that time they had been courting for several years.
当时他们已经谈了好几年的恋爱了。
He had been abroad many times.
他曾多次出国。
It was the third day running that the train had been late.
列车已经连续三天晚点了。