Not really, although if you say this, you will probably be understood. The word "today" does not require an article (a, the). Thus, we would simply say "today", and we would not say "a today." On the other hand, we can say "a day," or we can say "the day," since the word "day" is a regular, countable noun.
The subject in this sentence is "today," and the verb is "is".
Yes. Today is the subject; has been is the verb.
Yes, certainly. 'Today is the first day of the rest of your life.'
Yes, the word it can be the subject of a sentence. It is hot outside today. It hasn't rained this hard in ten years!
No, it is not a correct sentence. The pronouns 'her' and 'him' are objective pronouns, used for the object of a verb or a preposition. Your sentence has her and him as the subject of the verb 'have'. The corresponding subject pronouns are 'she' and 'he'. Corrected sentence: Did she and he have a disagreement today? However, when using the names of the people for a compound subject, both names are used, for example 'Jane and John". But when pronouns are used, the two people are usually referred to in the plural as 'they'. Better sentence: Did they have a disagreement today?
yes it is. the subject is the weather, and the verb is was.
Our subject today is "Native America Customs". The subject of the police investigation had a solid alibi.
Safety is of utmost importance in manufacturing companies. Safety was the subject of today's lecture.
I'm going to the movie today.
"it" is the subject. Controlling the verb "is".
The noun in the sentence is students. The subject 'all' is an indefinite pronoun; the words 'here' and 'today' are adverbs modifying the verb 'are'.
The correct phrase is "who you are today." "Who" is used as a subject or object pronoun in relation to people, while "whom" is used as an object pronoun. Since "who" refers to the subject of the sentence, it is appropriate in this context.