"thoughtful not joking" is not a sentence and it does not contain the word "serious".
Serious is an adjective, a word that describes a noun. Example: Justin has a serious expression on his face. The adjective "serious" describes the noun "expression".
Being serious means having a solemn or thoughtful demeanor, and focusing on important matters with sincerity and gravity. It often involves being earnest, attentive, and diligent in one's actions or speech.
regular speech
direct speech: a speech or a sentence quoted from a sentence somebody had spoken or am speaking. using inverted commas(" ") reported speech: a report of what somebody had said before. direct speech: a speech or a sentence quoted from a sentence somebody had spoken or am speaking. using inverted commas(" ") reported speech: a report of what somebody had said before.
In speech II, Socrates does not mention the alternative sentence "silence" as one of the options for his punishment, as it was not seen as a serious or acceptable alternative in his dialogue with the jury.
The individual word "sentence" is a common noun. However, a sentence itself is comprised of many different parts of speech.
The action in a sentence is the part of speech known as a verb.
There are no sentences that have no parts of speech. Every word in a sentence is classified as a part of speech, such as nouns, verbs, adjectives, etc.
it depends what word it is it could be any part of speech depending on the sentence
The word serious is an adjective. It means to be without any humour.
The word serious is an adjective. It means to be without any humour.
speech
In the sentence, "Which is his sister?", "which" is an interrogative pronoun.