At that time I had been job-hunting for six months.

　　那時我找工作已經(jīng)找了六個月了。

　　Particles of glass had been introduced into the baby food.

　　這種嬰兒食品中被摻進(jìn)了玻璃碎屑。

　　At that time they had been courting for several years.

　　當(dāng)時他們已經(jīng)談了好幾年的戀愛了。

　　He had been abroad many times.

　　他曾多次出國。

　　It was the third day running that the train had been late.

　　列車已經(jīng)連續(xù)三天晚點了。