Answer:
I guess what you did last night really wasn't that interesting.
The subordinate clause: what you did last night
Type: Noun clause
Explanation:
A subordinate clause is a group of words containing a subject and a verb that does not express a complete thought, therefore, they can not stand alone a full sentence. There are various types of subordinate clauses, one of them are noun clauses.
A noun clause act as a noun in a sentence, that is to say, as a subject, a direct or indirect object, a predicate nominative, or an object of a preposition, and they tend to begin with the words <em>what</em><em>, how, that, whatever, when, where, whether, which, whichever, who, whoever, whom, whomever, </em>or<em> why.</em>
In the sentence provided, then, the subordinate clause is <u><em>what you did last night </em></u><em>because i</em>t has a subject and a verb and it does not express a complete thought on its own. Furthermore, it is also a noun clause because it begins with the word <em>what</em> and is the direct object of the sentence, that is to say, the noun that receives the action <em>guess</em> in the sentence.
