They spent nine months before they were born 其中were后为什么加born

They spent nine months before they were born 其中were后为什么加born after they were born 和 when they were born be born的用法They were born quiet dogs.这句话中的were born怎么理解? some children were often found_______because they were born They were born 什么 the same day 什么 Alice! They are going back to the country _____they were born 1.Who invented the aeroplane?When were they born? who invented the aeroplane?when were they born? Who invented the aeroport?when were they born? from the moment they are born为什么用are而不是were? 英语翻译A man had two sons.They were twins.They were born at alm They have been living in the city since they were born.(改为一般