被动语态常用的八种时态 1. 一般现在时： People grow rice in the south of the country. Rice is grown in the south of the country. The school doesn't allow us to enter the chemistry lab without a teacher. We are not allowed to enter the chemistry lab without a teacher. 2. 一般过去时： They agreed on the building of a new car factory last month. The building of a new car factory was agreed on last month. The students didn't forget his lessons easily. His lessons were not easily forgotten.