Choose the correct word with polite affirmative form for the following.    to buyGroup of answer choicesかうますかうかますかいます

To select the correct polite affirmative form of the verb "to buy" in Japanese, we need to look at the options provided:

1. かう (kau) - informal form of "to buy."
2. ますかう (masukau) - not a correct form.
3. かますか (kamasuka) - not a correct form.
4. かいます (kaimasu) - polite affirmative form of "to buy."

Analysis of the Choices:

• かう (kau) is the dictionary form of the verb, used informally.
• かいます (kaimasu) is the polite form, which is the correct usage when making requests or stating actions politely.
• The other options, ますかう and かますか, do not follow correct verbal conjugation in Japanese.

Final Answer

The correct polite affirmative form for "to buy" is かいます (kaimasu).