请问has 和 was 的区别,也就是到底什么情况用has 什么情况用was?比如：he's saying please take his son?这里是Has 还是was呢?

请问has 和 was 的区别,也就是到底什么情况用has 什么情况用was?比如：he's saying please take his son?这里是Has 还是was呢? was passed和has passed的区别? 请问he was already fired和he has already been fired请问这两句有区别吗? has bought 和 was bought的区别是什么?急 请问he was already fired和he has already been fired请问这两句话有区别吗? Had has were was的区别 请问,A和C怎么区别,也就是反意疑问句的Yes和No怎么区别?谢谢 was appeared和has appeared的区别?一般用于什么情况下? it was gone和it has gone区别? What has happened和What was happened区别 has been working 和was working有什么区别 The sun was risen.和 The sun has risen.区别在哪里?请问这两句话表达的区别在哪里?我知道第二个是现在完成时,那么第一个又是什么时态呢? have和has的区别 have和has的区别 have和has的区别 was made与has been made的区别及用法 were和was的区别 were和was的区别