Is said whole, with nothing composed onto it and takes no だ/です, so there are no forms to conjugate.
お持ちする
omochisurulet me carry that (humble)expression
Example sentences2
荷物はわたしがお持ちすることになっております。
nimotsu wa watashi ga omochi suru koto ni natte orimasu.
I'll be the one to carry your luggage. formal
お荷物をお持ちすることもできますが、いかがですか。
o nimotsu o omochi suru koto mo dekimasu ga, ikaga desu ka.
I could also carry your luggage for you, if you'd like. formal