It can be, it could also be the object of a sentence it just depends on how the sentences is written.
subject -- The heat is stifling today.
object -- I can't stand this stifling heat
The complete subject of the sentence is "To change a liquid to a solid."
It is not an idiom - it means exactly what it says. Whatever the subject of the sentence is sitting under the sun in the heat.
The subject of the sentence is "you"
A subject in a sentence is who, what, or where the sentence is about.
The subject is who or what the sentence is about.
You is the subject of that sentence.
Yes. In "You baked a cake", "you" is the subject.
A subject is what the sentence is about.To make a sentence with a subject think like if it was a theme.
The subject tells who or what the sentence is about.
What is the subject of this sentence? She was the subject of an investigation.
"They" is the subject of that sentence.
To locate the subject of a sentence, identify who or what the sentence is about. The subject is usually a noun or pronoun that performs the action of the sentence. Look for the main verb in the sentence and ask "Who or what is doing the action?" to determine the subject.