This is called a compound complex sentence. The main clauses are usually connected by a conjunction. The subordinate clause is connected to a main clause by an adverb.
Simple sentence.
A subordinate clause is a clause that can not stand alone as a complete sentence, because it does not express a complete thought
Complex SentenceProof?when what is a complex sentence google itself defined it as:A sentence containing a subordinate clause or clauses.that is your answer but it doesn't mention an independent clause this is because all sentences have an independent clause since the subordinate(dependent) clauses need something to depend on especially when it is only one subordinate clause. So it has one independent clause with one or more subordinate clause or clauses.
A compound sentence contains two or more independent clauses, and no dependent (or subordinate) clause(s). The independent clauses that make up a compound sentence may be connected with a coordinating conjunction, conjunctive adverb, or semicolon.
A preposition introduces a subordinate clause to the main clause of the sentence. For example, both 'to the main clause of the sentence' and 'of the sentence' are subordinate clauses. The words 'to' and 'of' are prepositions. Subordinate clauses written by themselves are not complete sentences. The main clause is still a complete sentence without the subordinate clause. A preposition introduces a subordinate clause. The main clause of the sentence. The sentence.
One false statement about subordinate clauses is that they always function as independent sentences on their own. Another false statement is that they are always placed at the beginning of a sentence. Subordinate clauses can also come after the main clause in a sentence.
You make a complex sentence when you have both a dependent clause along with an independent clause.
A sentence with an adverb or adjective clause is a complex sentence, because an adjective clause is a subordinate clause. A complex sentence must contain one independent clause plus one or more subordinate clauses.
A sentence with an adverb or adjective clause is a complex sentence, because an adjective clause is a subordinate clause. A complex sentence must contain one independent clause plus one or more subordinate clauses.
A subordinate clause cannot stand alone as a complete sentence because it does not express a complete thought. It depends on an independent clause to form a complete sentence. Subordinate clauses usually act as adverbs, adjectives, or nouns in a sentence.
An Independent clause is independent or main clause expresses a complete thought and can stand by itself as a sentence. An Subordinate clause is a subordinate (or dependent) clause does not express a complete thought and cannot stand by itself as a complete sentence.
The sentence type that includes both a subordinate clause and an independent clause would be a complex sentence. You would need to insert a conjunction to separate the two clauses for the sentence to be grammatically correct.