0

I know it's to indicate whether something is a Na adjective or not, but other than the language rules stating it to be so, is there any real use of it?

I'm pretty sure everyone would understand you just fine with or without the extra「だ」so to me it's really unnecessary from a practical standpoint.

Is there a linguistics standpoint that makes 「だ」absolutely essential and not just a pointless language rule that everyone follow just because.

  • 3
    There are no such things as pointless language rules that people follow "just because." Also, just because people understand you doesn't mean what you've said is grammatically correct. – Kurausukun Dec 9 '17 at 9:15
  • A good way to approach this is by asking yourself "is the sentence complete without と思う appended at the end?" if it isn't complete, first complete it, then add と思う. That alone should point out why it's necessary. – psosuna Dec 14 '17 at 17:43
3

だ is a copula and it is a fundamental aspect of Japanese grammar and syntax - Copula

Leaving it out would simply result in an ungrammatical sentence like 「そうと思う。」It's a bit like asking "Do you need the 'is' in "he is a man" in an English sentence. You need it because in English the verb 'to be' functions as a copula. People would certainly understand the sentence without the 'is', right? But that's not how languages work. You need だ because the copula in Japanese indicates the relationship of the subject and predicate.

2

When と follows directly after a noun, it can be ambiguous if it stands for a case particle or a quote. In addition, although it can be omitted in casual conversation, it inevitably sounds a sentence with the verb omitted, hence not authentic.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.