Until now, this strategy seems to be still in operation.

2.By this reckoning, they have done well until now。

At this point, they have been doing very well until today.

To date1.to date, all patients under investigation have received treatment with this drug. So far, all patients under investigation have been treated with this drug.

2.The problem at this point was not with the dating method; the problem was finding the right thing to date.。

This problem does not conform to the method of measuring the date at this point. The problem is to find something to measure the date.

as yet 1.There was to be a fourth thing, but as yet he knew nothing of it.

2.How this might pertain to choices that people might make is, as yet, unclear.

How these methods are attached to the choices that people may make is still unclear.

so far 1.So far I have no regrets.

So far, I have no regrets.

2.So far, they appear to be up to the task

So far, they have shown that they have undertaken this task.