Yesterday is a noun in that sentence.
The circumstances in which Martin Luther King Jr gave his "I have a dream" speech was part of the march on Washington. It was one of the largest political rallies in history.
The freedom of speech is in the Bill of Rights and the right to vote is also a form of speech. When a person votes they a choosing a person to represent them which makes it speech. Protests are part of speech and so it written articles and newspapers part of the freedom of speech.
Apartheid is a noun.
Historical is an adjective.
Monarch is a Noun.
Yesterday is an adverb in that sentence.
In the sentence "yesterday the leaves hung on the tree," "yesterday" is functioning as an adverb modifying the verb "hung."
It's an adverb.
"Yesterday" is an adverb modifying the noun "afternoon".
The word yesterday is an adverb.
Walked is a verb.
regular speech
I think yesterday is a noun, because it is definitley not a verb or adjective. It is not an action and it does not describe anything.
it depends what word it is it could be any part of speech depending on the sentence
The action in a sentence is the part of speech known as a verb.
History is a noun.
The part of speech for "gliding" is a gerund, which functions as a noun in a sentence.