there be 句型的完成时态结构是什么

there be的现在完成时there have been /there has been
其它时态
过去完成时there had been
一般现在时there is / are
一般过去时there was /were
一般将来时there will be /there is going to be /there are going to be
过去将来时there would be /there was going to be /there were going to be
希望对你有所帮助.

there be的现在完成时there have been /there has been
e.g there has been life on earth for millions of years