Read and remember.
When we are talking about something

Read and remember.
When we are talking about something that happened in the past and want to say about things that happened before this time, we use the past perfect.
1.nbsp; nbsp; When we came she had already translated the article. Когда мы пришли, она теснее перевела статью.
2.nbsp; nbsp; Не had phoned his friend before he left the office. Он позвонил другу перед тем, как уйти из кабинета.
3.nbsp; nbsp; We had done the task by 4 oclock yesterday. Мы выполнили задание к четырем часам вчера.
4.nbsp; nbsp; Не had changed his mind by that time. Он изменил свое мнение к этому времени.