For the purpose of (doing something)

I will have (someone) do (something) for me

V-causative + ていただきます

I will do (something) politely

お + V-stem + します

Could you please do (something) for me?

V-て + いただけませんか

I am doing (something) humbly

V-て + おります

(Someone) can do (something) respectfully

V-(ら)れます（尊敬）

Must not (do something)

V-ない + なければならない