‘not having done’ OR ‘having not done’

[enydia]

Hi teachers.

Which is right, ‘not having done’ or ‘having not done’?

For example:

Not having taken the survey, all the students hold completely opposite point of views.

Having not taken the survey, all the students hold completely opposite point of views.

Which is right?

 

[Koronas]

"Not having taken the survey". They hadn't taken the survey. Maybe it wasn't offered or they didn't know about it.

"Having not taken the survey". This sounds more deliberate. They knew about the survey but decided not to take it.

(The difference is very subtle and would need to be confirmed by context.)

By the way, the sentence as a whole doesn't make much sense! It suggests that the students hold opposite points of view because they had not taken the survey - which seems to be nonsense.