was appeared和has appeared的区别?一般用于什么情况下?

was appeared和has appeared的区别?一般用于什么情况下? App Something strange___ in the sky suddenly iust now.A was appeared B appeared C had appeared D was appearing Though the keys were pressed,nothing_____on the screen.( )A.appeared B.was appeared C.appears D.is appeared A rainbow （）in the sky after the rain A was appeared B appeared C is appeared D are appeared选哪个 为什么 讲解仔细 He has appeared ,的否定句形式是什么啊? was是什么意思?have和has是什么意思? was passed和has passed的区别? none 和no oneSusan was expecting her favourite singers,but to her disappointment,_____ appeared.a noneb no one选什么?为什么? appeared to have he was surprised by the strength of the effect that owning a cat appeared to have. Nowdays ,there has appeared a heated discussion 中there has 是不是语法错误 如何区分APP防水卷材和SBS防水卷材 请问itunes store和app store有什么区别吗 Web.config 和 App.config 的区别分析 c++中的app和ate是什么英文单词的缩写? appeared in striking contrastI only wish it was settlecutting down the treesIt was not this spring beneficiary’s certificate certifying that one set of non-negotiable documents has been sent to app it was gone和it has gone区别?