用这几个短语该怎么造句、?（急用）

I was reading a book when it started to rain yesterday.昨天开始下雨的时候,我正在读书 I was about to go shopping when the telephone rang.当我正要去购物的时候电话响了 I had broken a cup when my mother came in.我妈进来的时候我已经打碎了一个杯子（注意是过去完成时） I should have done some mopping before he came back 在他回来以前我应该拖下地 I should not cheated her when my mother asked the question.我妈问我问题的时候我不应该撒谎