Japanese verbs are divided into three groups. Each group has its own patterns of conjugations. "Group 1" are the verbs that have the vowel I in the syllables before MASU. KAKIMASU (to write ...

When you ask somebody to do something in Japanese, you say TE-form verbs and then KUDASAI (Please, or I would ask you to). The TE-form verbs are the conjugated form of verbs that end with TE or DE.