Can we use two active verbs for a sentence? For example in #1:
- Special care is taken to extract irregular borders during the modeling.
- Special care is taken when extracting irregular borders during the modeling.
Which is correct, 1 or 2?
Either sentence is fine. But they mean different things:
Special care is taken to extract irregular borders during the modeling.
This means that you expend extra effort to make sure that irregular borders are in fact extracted and not overlooked.
Special care is taken when extracting irregular borders during the modeling.
This means literally that extra effort is expended on something unspecified during that part of the process when irregular borders are extracted. But if this is an error, it is probably a very minor one; people will assume that you mean:
Special care is taken in extracting irregular borders during the modeling.
That is, the extra effort is expended on extracting the borders.