Genki Lesson 3 confusion

So I am doing lesson 3 of Genki. I am on verb conjugation. The book says I will learn the dictionary forms, the present tense affirmation forms, and the present tense negative forms. The thing is goes straight into ru-verb, u-verbs and irregular verbs without explaining what it means by the forms.

Could anyone clarify for me please?

Could you be more specific what is confusing to you?
Dictionary form, present tens affirmative, present tense negative are orthogonal to ru-verb, u-verb and irregular verbs.

As an aside a more β€œnormal” way to refer to these different verb types is ごだん(u-verb), いけだん(ru-verb) and irregular. Genki thinks ru- and u- verb are easier for some reason. Just so you know if you look something up on the internet regarding that point.

So you have verbs like はγͺす - to speak, which is a ごだん verb and therefore conjugated differently to γŸγΉγ‚‹ - to eat which is a いけだん verb.
Irregular verbs are luckily rare in Japanese. The main ones being する and くる

All of these categories have different ways of how you have to conjugate them to get to present tense negative for example.

Present negative means: I do not (しません) | I don’t eat (γŸγΉγΎγ›γ‚“) | I don’t speak (はγͺしません)
Present positive means: I do (します) | I eat (γŸγΉγΎγ™) | I speak (はγͺします)
Dictionary form is how you find it in the dictionary: to do (する)| to eat(γŸγΉγ‚‹) | to speak(はγͺす)

I was confused mainly about what dictionary form, present negative and present positive meant. Thanks.

One follow up. Do u-verb, ru-verbs and irregular words effect the words in anyway or are they just spelling?

It’s not a different spelling. It’s how Japanese verbs are categorized.
It has an effect on how you have to conjugate them from the dictionary form to get to the other forms/tenses. You will learn many more forms in the rest of Genki, and how you build these forms for each verb depends on if it is a ru- or an u-verb.

Conjugation happens in (I think) every language. I don’t know what your mother tongue is, but if we take English you also have conjugtations:
I speak, she speaks | I wasn’t speaking, she wasn’t speaking | I spoke, she spoke

How you get from the base to the correct tense/form is called conjugation. In English as example adding ed is normally how you get to the past tense (talk β†’ talked). But many verbs are irregular (speak β†’ spoke). In Japanese MOST verbs are regular and there are 2 categories of regular verbs RU- and U-verbs.

To expand on this, γ‚‹-verbs drop the γ‚‹ when conjugating, while う-verbs have the final う sound change to something else when conjugating.

γ‚‹-verb example: ι£ŸγΉγ‚‹ 食べγͺい 食べた
う-verb example: ι£²γ‚€ 飲まγͺい 飲んだ

Irregular verbs conjugate irregularly. Fortunately, there’s only two of them: する and くる

する しγͺい γ—γŸ
くる こγͺい きた

葌く(いく) is probably worth mentioning in the irregular category since it become いって and not いいて as you would expect from a γ€œγ godan verb

I am an English speaker but the word conjugation was not really taught to me. I get the concept though.

To make sure I understand. So something like β€˜to eat’ has conjugation for ru-verb, u-verbs and irregular verbs and they all effect effect the word they make.

Am I right?

No, each verb is in one category. The category doesn’t mean anything, it’s just language plumbing.

It’s like how in English some verbs take β€œd” in past conjugations (hired) and some take ed (talked) and some others something completely different (spoke, not speaked).

You need to know the category to come up with the correct form but it has no additional meaning. If you don’t know that γŸγΉγ‚‹ is ichidan you don’t know if you should conjugate たべた or たべった in the past.

Ah I see. I apologize. I think I worded my question wrong. I wanted to know if there was a difference between ru-verbs, u-verbs and irregular verbs besides spelling. Thank you.

Oh no, it’s completely arbitrary. It’s like grammatical gender in languages like Spanish or French, where every word is either feminine or masculine. There are some patterns you can recognize to help guess which is which but at the end of the day it’s fairly arbitrary and will involve some rote memorization.