Орехова Оксана Дмитриевна

Определить видо-временную форму и залог глагола сказуемого   1 ответ

Добрый день, помогите пожалуйста определить видо-временную форму и залог глагола сказуемого:
1. When much had been done in the study of ecology by our institute it
became an important scientific centre .
2. Buses were introduced first in Paris in 1820.
3. Mathematics is loved by many, disliked by a few, admired and respected by all.
4. Rome was not built in a day .