up to now基本解释
副词至今; 迄今; 到目前为止
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adv
1. used in negative statement to describe a situation that has existed up to this point or up to the present time
e.g. So far he hasn't called
the sun isn't up yet
Synonym: so farthus farhithertoheretoforeas yetyettil nowuntil now
2. prior to the present time
e.g. no suspect has been found to date
Synonym: to date
1. 到目前为止：unwanted side effects 有害的副作用 | up to now 到目前为止 | upgrade the stock's rating 提升了股票的等级
2. 到现在为止：Up to now nobody has claimed the suitcase.到现在还没人认领这个行李箱. | Up to now 到现在为止 | I won't claim credit for it. 功劳不在我,credit 名声
3. 至今：owing to 因为 | up to now 至今 | Chambers of commerce in foreign countries 在外国的商会
4. 直到现在：unspoken adj.未说出口的;非口语的 | up to now 直到现在 | various adj.不同的;各种各样的
