Answer:
I shall go | because he has invited me.
Main clause | Subordinate clause
Step-by-step explanation:
The sentence "I shall go because he has invited me" contains two clauses:
Main clause "I shall go"
This is an independent clause that stands alone as a complete sentence. It contains a subject "I" and a predicate "shall go". The main clause expresses the main idea of the sentence.
Subordinate clause "because he has invited me"
This is a dependent clause that cannot stand alone as a sentence. It starts with the subordinating conjunction "because" and contains a subject "he" and a predicate "has invited me". The subordinate clause functions as an adverb in the sentence and modifies the main clause by giving a reason for the speaker's action.
The sentence is a complex sentence because it contains one main clause and one subordinate clause. The main clause can stand alone as a complete sentence, but the subordinate clause cannot. The subordinate clause adds information to the main clause by providing a reason for the speaker's action.