上节课我们学习的be动词在单数人称下的过去时was，今天我们将学习其在复数人称下的过去时were。请参看以下句子：They were friends. （他们曾是朋友）They were not friends. （他们不曾是朋友）Were they friends?（他们曾经是朋友吗）We were in Beijing yesterday.（昨天我们在北京）We weren’t in Beijing yesterday.（我们昨天不在北京）Were we in Beijing yesterday?（我们昨天在北京吗）请试着回答以下问题：Were you in Shanghai yesterday?（你昨天在上海吗）Were you in Beijing yesterday?（你昨天在北京吗）Where were you yesterday?（你昨天在哪里）