Similar to respectful language, verbs can also change their form by adding a prefix and the verb "suru" or "itasu". For example, "motsu" (carry) becomes "o mochi shimasu". The use of humble forms may imply doing something for the other person; thus a Japanese person might offer to carry something for someone else by saying "o mochi shimasu". This type of humble form also appears in the set phrase "o matase shimashita", "I am sorry to have kept you waiting", from "mataseru" (make wait) with the addition of "o" and "shimasu". Similarly, "o negai shimasu", "please this", from "negau" (request or hope for), again with the addition of "o" and "shimasu".