Breakdown of Tämä kirja ei ole vaikea.
tämä
this
olla
to be
kirja
book
ei
no / not (en, et, ei, emme, ette, eivät)
vaikea
difficult / hard
Questions & Answers about Tämä kirja ei ole vaikea.
Why do we need two words, ei ole, to say "is not"?
Does the word ole change if we talk about a different subject, like "I am not"?
No, the word ole stays exactly the same! Only the negative verb changes to match the person. For example, "I am not" is en ole, "you are not" is et ole, and "this is not" is ei ole. The word ole is locked in this form.
Why is the adjective vaikea in its basic form here instead of the partitive case (vaikeaa)?
Learners often hear that negative sentences need the partitive case, but that rule applies to the object of an action (like what you are reading or eating). Here, vaikea is just describing the subject. Because a book (kirja) is a single, countable object, the adjective describing it stays in its basic form (the nominative case), even in a negative sentence.
Could I leave out the word kirja and just say Tämä ei ole vaikea?
Yes, absolutely! Tämä means "this". If it is already clear from the context that you are talking about the book, you can just use the pronoun on its own and say Tämä ei ole vaikea (This is not difficult).
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