Demand for/Request for/Order for
The words 'demand', 'request', 'order' when used as verbs, irrespective of whether they are in their progressive forms, do not take the preposition 'for'. They are all transitive verbs, which are meant to be followed immediately by their objects.
Sentences such as the ones below are wrong:
- I will order for my own drink too.
- We demand for our rights.
- Please request for a laptop.
- I will order my own drink too.
- We demand our rights.
- Please request a laptop.