up to now用现在完成时态。
up to now意思是到现在为止,故用现在完成时。
up to now英[p tu: nau]美[p tu na]
up to now:
adv.到现在为止;至今;迄今;到目前为止;
now:
adv.现在;目前;此刻;从现在开始;表示厌烦;
conj.既然;由于
1.Up to now the post of president has been largely ceremonial.
到目前为止,总统一职在很大程度上只是礼仪性的。
2.The government has just stood on the sidelines up to now and let the situation get worse.
迄今为止政府仅仅是置身局外,任凭事态恶化。
3.This is an attempt to put flesh on what has been a very bare skeleton plan up to now.
这是一次试图使至今还只是框架的计划充实起来的尝试。