have been 和 has been的区别

have been 和 has been的区别

have been 和 has been 的区别在于它们的主语使用的代词人称和名词、代词的单复数形式。
have been 的主语在数量上须是复数名词或代词，在人称上则是除单数第三人称以外的所有人称代词。has been 的主语名词和代词一定是单数形式或单数第三人称。例：
All students have been asked to stay at home due to the unexpected earthquake.
I have been trying to call my English teacher the whole morning.
She has been working hard for this year's presidential campaign.

has的主语是第三人称单数； 　　have的主语不是第三人称单数。 　　这个两个时态都是现在完成时，have都是一般现在时的时态，动词的变化主要看主语的变化。

have/has been to 已经去过，现在回来了

have/has been in 已经呆在，