He was in a big company before 2001. 点时间前
He had been to many countries before his son was born.点时间前
Last week he said he had been to the UK 5 years before. (这里不能用ago) 上周算起5年前
He was in a big company before 2001. 点时间前
He had been to many countries before his son was born.点时间前
Last week he said he had been to the UK 5 years before. (这里不能用ago) 上周算起5年前