Is "dog" written separately? - briefly
Yes, the word "dog" is typically written as a separate word in English. It is not combined or connected to any other words unless it forms part of a compound noun.
Is "dog" written separately? - in detail
The question of whether the word "dog" should be written separately depends on the context in which it is used and the rules of grammar that apply to that context.
In general, when referring to the animal, the word "dog" is written as a separate word. For example: "I have a dog named Max." Here, "dog" is a noun and is written separately from other words in the sentence.
However, there are instances where "dog" may not be written separately. One such instance is when "dog" is used as part of a compound word or phrase. For example: "I am dog-tired after that long walk." In this case, "dog" is combined with the adjective "tired" to form the compound adjective "dog-tired," which describes the state of being very tired.
Another instance where "dog" may not be written separately is when it is used as a suffix in a word. For example: "The doghouse is where the dog lives." Here, "doghouse" is a single word that combines "dog" with the noun "house," and there is no space between them.
In summary, whether "dog" should be written separately depends on its role in the sentence and the grammatical rules that apply to that context. As a general rule, when referring to the animal, "dog" is written as a separate word. However, when used as part of a compound word or phrase, or as a suffix, it may not be separated by spaces.