we know that we all （learn） our own language well when we were children.这是什么时态?

翻译：我们都明白当我们还是孩子的时候,我们学习语言的能力是很好的.当我们还是孩子的时候,这是发生在过去的事情,现在已经不是孩子了,所以用were 一般介绍自己小时候的事情,就会说：when I was a child… 前面用lear...可以再给几个例句吗？拜托了we were told that the moon goes around the earth when we were in the kindergarten. 在幼儿园的时候，我们就知道月亮绕着地球转。 My son asked me:"why does 1 and 1 equal 2." yesterday. 我儿子昨天问我一加一为什么等于二。 That Yangtze River runs into the sea was stuck in my mind when I was very young. 在我很小的时候，长江流入大海这个事实就深深印刻在我脑海里了。