白と黒のどちらかをえらんでください。
- Please choose either white or black.

白と黒のどちらかをえらんでください。 meaning: Please choose either white or black.

The sentence follows a common Japanese structure: Subject (implied) + Topic (optional) + Object + Verb. ⚫︎ The basic sentence pattern is Object + Verb: どちらかをえらんでください。 ⚫︎ The implied subject is "you". ⚫︎ The topic marker は (wa) is omitted. ⚫︎ The object is どちらか (either one). ⚫︎ The verb is えらんでください (please choose).

This sentence demonstrates several important particles. ⚫︎ と (to): This particle means "and" when connecting nouns. Here, it connects 白 (white) and 黒 (black), forming a list. ⚫︎ の (no): This particle indicates possession or acts as a modifier. Here, it modifies どちら (which/either) to indicate which one of white and black. ⚫︎ か (ka): This particle turns a sentence into a question. Here, it is used after どちら (either one) to create the phrase どちらか (either one/which one).

This is a common fixed expression at the N4 level. ⚫︎ どちらか (dochiraka) translates to "either one" or "which one" in this context. ⚫︎ It is formed by どちら (which/either) + か (ka - question particle), implying a choice between two or more options. ⚫︎ This expression is used when asking or suggesting a choice, or when asking which one from a few given options.

This sentence uses the polite imperative form of the verb. ⚫︎ The verb えらぶ (erabu - to choose) is conjugated to the te-form えらんで (erande). ⚫︎ The te-form is followed by the polite imperative form ください (kudasai), which means "please." ⚫︎ This formation adds politeness to the command, making it suitable for requests. ⚫︎ The polite imperative is formed by combining the -te form of a verb with ください.

This sentence does not contain any adjectives. There is no relevant grammar point for adjective conjugation.