吃几颗避孕药会不孕:It has always been because...是强调句型吗?如何翻译和使用?谢谢

It has always been because...是强调句型吗?如何翻译和使用?谢谢 Do you know when it __?A,built B,was built C,has been built it has been argued 如何翻译？ it has been demonstrated that 的意思？ it has been a while是什么意思？ 是It has been paid还是 It has been paid for? 为什么是It has been paid而不是 It has been paid for? always been 还是been always? 翻译句子Nothing has ever been done to it It has been great talking with you这话对不对？