How can I construct a perfect sentence? Both, principal and subordinate clause has a subject and a predicate. How can I be sure that the sentence I formed is a principal clause?

For e.g. I am very tired

Is this a principal clause? Or should I say, I am very tired, today.

What are the main elements of a principal clause that can confirm that my sentence is a principal clause?

  • A main clause is not dependent on some other element in the sentence. In other words, it is not embedded as a dependent within some larger clause. Generally, a main clause can stand alone as a sentence.
    – BillJ
    Commented Dec 30, 2022 at 13:53
  • On a side note: you should be using "principle", not "principal". A principal is the head of an elementary school or high school (in the US). In other words, a school below the university or college level. A common aid to keeping the usage straight is to remember that "the principal is your pal". Commented Aug 18, 2023 at 13:29

1 Answer 1


If a sentence only has one clause, then that clause is the principle clause.

The main property of a principle clause is that it is not subordinate to another clause. If there is only one clause, this condition is satisfied trivially.

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