up till now:
We agree fairly well up till now.
我们至今为止相处甚欢.
Until now:
Until now,probate has been done exclusively by solicitors.
至今为止,只有律师才能承接遗嘱鉴证业务.
So far:
So far,the signs are encouraging.
至今为止,这些征状还是很鼓舞人的
as yet用在否定句中
As yet,he and other farmers have received nothing.
可至今为止,他也其他的退地农民一分也没有拿到.