完成时与一般现在时的区别He 's back from London already,____?isn't he .有already不是完成时吗,为什么不选 hasn 't he

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完成时与一般现在时的区别He 's back from London already,____?isn't he .有already不是完成时吗,为什么不选 hasn 't he
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完成时与一般现在时的区别He 's back from London already,____?isn't he .有already不是完成时吗,为什么不选 hasn 't he
完成时与一般现在时的区别
He 's back from London already,____?
isn't he .有already不是完成时吗,为什么不选 hasn 't he

完成时与一般现在时的区别He 's back from London already,____?isn't he .有already不是完成时吗,为什么不选 hasn 't he
因为back是副词,所以He's表示的是He is.如果是He has那么它后面就应该是动词,如:He's come back from London already.
He 's back from London already,isn't he?(意思是:他已经从伦敦回来了,是吗?)
注意:already这个词不是只能用在现在完成时中的,只是一般都在现在完成时中出现而已.
(以上是我的个人理解,你可以作一个参考)