In Genki II 3rd edition, it looks like itโs chapter 15, section 4 โUsing Sentences to Qualify Nounsโ.
In the phase ใใใใใๆฌ, the ใ-adjective ใใใใใ qualifies the noun ๆฌ and tells us what kind of book it is. You can also use sentences to qualify nouns. The sentences that are used as qualifiers of nouns are shown in the boxes (in bold) below.
- ๆจๆฅ่ฒทใฃใ ๆฌ - the book that I bought yesterday
- ๅฝผใใใใ ๆฌ - the book my boyfriend gave me
- ใคใใใฎไธใใ ๆฌ - the book that is on the table
- ๆฅๆฌใง่ฒทใใชใ ๆฌ - the book that you canโt buy in Japan
Qualifier sentences in these examples tell us what kind of book we are talking about, just like adjectives. The verbs used in such qualifier sentences are in the short forms, either in the present (as in examples 3 and 4) or the past tense (1 and 2), and either in the affirmative (1-3) or the negative (4). When the subject of the verbโ that is to say, the person performing the activityโ appears inside a qualifier sentence, as in example 2 above, it is accompanied by the particle ใ and not ใฏ.
A โqualifier sentence + nounโ combination is just one big noun phrase. You can put it anywhere in a sentence that has a noun.