一般现在时：e.g. Football is played all over the world. I’m often asked to do this work. 我常常被派做这项工作。 一般过去时：e.g. The terracotta warriors were found in 1974 near Xi’an.  They were discovered by workers in a field outside the city. When was the building completed? 这座大楼什么时候建成的？ 一般将来时：e.g. The result of the exam will be known soon. They are going to be given a difficult test.

am/is/are + 过去分词

was/were +过去分词

be going to + be + 过去分词