Introduction to 国文法:活用
In 国文法, there's no such verbs that belong to Group 1, Group 2, Group 3/Irregular verbs.
All verbs are categorized under the following
五段動詞(Group 1): Verbs changes based on あ、い、う、え、お-段
上一段動詞(Group 2): All special verbs like 生きる、見る
下一段動詞(Group 2): All verbs that end with え sound.
カ変動詞 (Group 3): 来ます
サ変動詞 (Group 4): します
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In the Japanese that we learn, we learn things like ない-form, ます-form, 辞書形、可能形、意向形,etc
In 国文法, the forms are
1.未然形 (imperfective form)
2.連用形 (conjunctive form; continuative form)
3.連体形 (participle adjective; attributive form)
4.終止形 (predicative form)
5.仮定形 (hypothetical form)
6.命令形 (imperative form)
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In Japanese schools in Singapore, e.g JCS, students are taught that the base form used to switch to other forms is 辞書形 (dictionary form)
In Japan, the base form always start from 連用形 (ます-form minus the ます)
e.g:
五段動詞
買います (buy)
Step 1: Identify the 連用形, 買います->買い
Step 2: Identify which form you wish to change, e.g maybe you want ない-form (未然形 in 国文法)
Remember Hiragana Chart:
あ (わ)、い、う、え、お
Step 3: Change to 未然形
未然形: 買い (連用形) -> 買わ (未然形)
ない-form: 未然形＋ない
受身形: 未然形＋れます
使役形: 未然形＋せます
Answer: 買わない
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一段動詞 (Group 2)
一段動詞 got this characteristic.
Everything is just 連用形＋＿＿＿＿＿＿＿＿＿＿＿
e.g
ない-form: 連用形＋ない
辞書形(終止形): 連用形＋る
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
These are just some examples.
You might not see the benefits just by seeing this...
The hidden benefit is that students who study this will be able to construct sentences faster in conversation, another thing is just by seeing the verb, the sentence can know which group it belongs to, without having to change to dictionary form or memorizing.
If you were to ask a Japanese (exclude Japanese teacher), what's a い-adjective and a な-adjective, they won't know. But if you were to say, 形容詞 and 形容動詞, they would understand.
If you were to look at those old published China books, you would realise they in the book, there's no Group 1, 2 or 3. China is following 国文法 to teach.
Unless you learn this system, if not it would be hard for you to know the benefits easily.
But according to the table, that's for native English speaker, non-native English speaker might be different...Coz I've learned Arabic before(also in the same category) but not that hard as it uses alphabet unlike Japanese IMHO..
