a food make to let cook fire us on 连词成句 则呢么连?

Let us make a fire to cook food on.
=Let us make a fire so that we can cook food on it.
make a fire,生火.cook food,做吃的.
句子翻译；让我们生火用它做（吃的）饭.i was late for school yesterday(改为一般疑问句）（）（）late fo school yesterdayWere you late for school yesterday?