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A noun is used as the subject of a sentence or a clause, and as the object of a verb or a preposition.Examples:The present is for my niece's birthday. (subject of the sentence)In the time that the present allows we can accomplish a lot. (subject of the clause)He wrapped the present before I could see what is was. (direct object of the verb)You can park your car here for the present. (object of the preposition)
A sentence missing a subject or a verb is a fragment.
The verb in the given sentence, "could be" is in a conditional present tense.
It could be.
It could potentially be the subject of a sentence, if that is what you mean.
By adding the appropriate subject-auxiliary inversion, the sentence could be rewritten as an interrogative sentence.
he was subject to an investigation
Subject personal pronouns are I, he, she, it, we, you, and they.
The essential parts of a sentence are the subject and the predicate. The subject of a sentence refers to who or what the sentence is about. The predicate is the verb that shows an action. For example, in the sentence 'Bob sneezed.', the subject is Bob and the predicate is sneezed.
Biology was a subject I studied a school.
The subject is I.
Yes, it could. Example: This is awesome!