IV. Verb modifiers : Koo, soo, aa and doo

Koo means "this way," soo "that way" and aa "that way." Doo means "how." These words are similar to kore, sore, are and dore. They modify the verb they precede.
Examples
1. Kono kanji wa doo kakimasu ka.
"How do you write this kanji?"
2. Koo kakimasu.
"We write it this way."
3. Kono kikai wa doo tsukaimasu ka.
"How do you use this machine?"
4. Koo tsukaimasu.
"We use it this way.