De or het conceptvorming?

The correct Dutch article is:

de conceptvorming

Rule Words ending in -ing: almost always de. See the rule

How to use conceptvorming

the conceptvormingde conceptvorming
this conceptvormingdeze conceptvorming
that conceptvormingdie conceptvorming
our conceptvormingonze conceptvorming
your conceptvormingjouw conceptvorming
every conceptvormingelke conceptvorming
which conceptvorming?welke conceptvorming?
a big conceptvorming / the big conceptvormingeen grote conceptvorming, de grote conceptvorming