Meaning and Usage
The word どの is a demonstrative adjective used to ask "which" among multiple known options. It always modifies a noun directly, unlike どれ which stands alone as a pronoun. It is very common in everyday questions when you want to specify one item or person from a group.
Common Collocations
- どの + noun: to specify "which" particular item or person
- どのくらい / どのぐらい: to ask "how much" or "how long" (time, quantity)
Register and Politeness
どの is neutral and polite enough for daily conversation and formal situations. It is often used with polite verbs like ですか.
Common Confusions
Learners sometimes confuse どの with どれ. Remember, どの must be followed by a noun (e.g., どの本), while どれ can stand alone as a pronoun (e.g., どれが好きですか？).
Practical Tips
Use どの when you want to directly point out "which" among several known items and you want to mention the noun explicitly. This helps avoid ambiguity and makes your question clear and natural.