there be 句型变成现在完成时,什么时候用has,什么时候用have

问题描述:

there be 句型变成现在完成时,什么时候用has,什么时候用have

看be 之后的名词是单数还是复数,单数用has,复数用have.
eg.There has been some time.
There have been some apples in the basket.