How to change Dictionary Form into Polite Form

Form: verb and adjective
Form: verb and adjective
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On this page, you can learn how to change Dictionary Form into Polite Form.

Polite Form to be polite

In regards to verbs and adjectives, what you find in a dictionary is categorised as Dictionary Form.

Generally speaking, when you speak or write in Japanese, you should change the verb (or adjective) Dictionary Form into Polite Form every time.

Why do I have to change Dictionary Form into Polite Form?
It is highly recommended that you do that when you speak or write in Japanese.

Change Verb into Polite Form

All you need to do is to change Dictionary Form into Stem Form, then add one of the endings below.

Present tense (positive) Stem Form + ます
Present tense (negative) Stem Form + ません
Past tense (positive) Stem Form + ました
Past tense (negative) Stem Form + ませんでした

Click here if you don’t know how to make Stem Form.

Note

The first one in the chart above (Stem Form + ます) is also called ますform.

ます Form (masu form)
On this page, you can learn what ます Form (masu form) is.

Exercise

Task: Change a verb dictionary form into ますform.

  • およぐ
  • のる
  • ねる
  • する
  • はなす
  • たべる
  • もらう
  • おきる
  • つくる
  • まつ
  • くる

Answer

Change いAdjective into Polite Form

Other than ‘Present tense (positive)’ below, you have to remove い at the end of いadjective Dictionary Form to add the following endings.

Present tense (positive) Dictionary Form + です
Present tense (negative) Dictionary Form (Remove い) + くないです
Past tense (positive) Dictionary Form (Remove い) + かったです
Present tense (negative) Dictionary Form (Remove い) + くなかったです

Change なAdjective into Polite Form

You have to remove な at the end of なadjective Dictionary Form to add the following endings.

Present tense (positive) Dictionary Form (Remove な) + です
Present tense (negative) Dictionary Form (Remove な) + じゃないです
Past tense (positive) Dictionary Form (Remove な) + でした
Present tense (negative) Dictionary Form (Remove な) + じゃなかったです
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