up to now只能与现在完成时连用吗?Up to now I have been reading this book.这个句子对么?

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up to now只能与现在完成时连用吗?Up to now I have been reading this book.这个句子对么?
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up to now只能与现在完成时连用吗?Up to now I have been reading this book.这个句子对么?
up to now只能与现在完成时连用吗?Up to now I have been reading this book.这个句子对么?

up to now只能与现在完成时连用吗?Up to now I have been reading this book.这个句子对么?
一般都是
句子正确,用的是现在完成进行时.说明某一动作从过去已经开始,而且持续到现在,很有可能还会继续下去.也就是说这本书我只读了一部分,还会再读完的

Sure.
= so far, until now