1. Spot the form. Complete the sentences with the Past Perfect Continuous form of the verbs in brackets. 1) Mendeleev (work) on his table for months. 2) By the time the lecture began, the students (read) about Lomonosov. 3) She (do) research since Monday.

Перевод задания: Определите форму. Дополните предложения формой Past Perfect Continuous глаголов в скобках.

1. Mendeleev had been working on his table for months. (Менделеев несколько месяцев работал над своей таблицей.)
2. By the time the lecture began, the students had been reading about Lomonosov. (К тому времени, как началась лекция, студенты уже читали о Ломоносове.)
3. She had been doing research since Monday. (Она занималась исследованиями с понедельника.)

Формула Past Perfect Continuous: had been + глагол с окончанием -ing.