今天我们将练习如何使用be动词的过去时提问。提问时我们需要将be动词提至句首,请参看以下几个问题:Were they friends?(他们曾经是朋友吗)Was Yoyo your best friend?(Yoyo以前是你最好的朋友吗)Was your mother at home yesterday?(昨天你妈妈在家吗)Was your father at home yesterday night?(昨晚你爸爸在家吗)Was your brother in Xi’an yesterday?(你哥哥昨天在西安吗)Were you in Shanghai last week?(上周你在上海吗)