None of the clauses in the sentence is an example of the present progressive construction. Wanting is just the verb of a gerund clause, with a possessive subject your. One could also say my wanting, his wanting, her wanting, their wanting, or our wanting.
– John LawlerSep 05 '14 at 20:11
And in addition to what @JohnLawler said, understand is a verb that does not take a gerund afterwards, but nouns. So you'd say "I understand your request to wait a while longer." and that sounds more grammatical.
– NeekuSep 05 '14 at 20:12
Actually understandcan take a gerund complement -- with or without subject -- as well as that-complements and embedded question complements. They're different, though: I understand her kissing him doesn't mean the same as I understand that she kissed him or I understand who she kissed.
– John LawlerSep 05 '14 at 20:20
@JohnLawler Very crafty ordering her and him that way to avoid prickling the prickly. Well done!
– tchristSep 06 '14 at 00:00