HOW TO FORM IT: The past perfect tense is made with had/have + the past participle. With regular verbs, the past participle ends with "-ed."
THE BIG PICTURE: Use it when talking about two things that happened in the past. The past perfect shows which thing happened first.
RULES OF THUMB:
- Look for signal words "until" and "before" to know when a past perfect verb will be needed.
- I had never met a Russian person before I went to Moscow.
- Mary had never traveled oveseas until she went to England.