Simple
A subordinate independent clause is a type of clause that has both dependent and independent qualities. It can function independently as a complete sentence but is usually part of a larger sentence and relies on another clause for context or meaning. This type of clause often begins with a subordinating conjunction.
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.
Simple
Complex (APEX)
Complex (APEX)
Not a simple sentence, but a compound, complex or compound-complex may have its principal or independent clause in inverted order within the sentence.
An independent clause contains a subject and a verb. It need contain nothing else, though it may. If the verb is impersonal, it need not even contain a subject. 'It is snowing' is an independent clause consisting of a three-word impersonal verb formation and nothing else.
"Before" is a subordinating conjunction that introduces a dependent clause. It is used to show the relationship between the dependent clause and the independent clause in a sentence.
"Whenever" is a subordinating conjunction, linking a dependent clause to an independent clause in a complex sentence.
A sentence with one main clause and one or more dependent clauses is a complex sentence. This type of sentence has one independent clause that can stand alone as a complete sentence, along with one or more dependent clauses that rely on the main clause for meaning.
The sentence "I will walk and he will ride a bike" consists of two independent clauses connected by the coordinating conjunction "and." The first clause "I will walk" is a main clause with subject "I" and verb "walk." The second clause "he will ride a bike" is also a main clause with subject "he" and verb "ride." The phrases in the sentence include "a bike" which is a noun phrase serving as the object of the verb "ride."
Recognize a clause when you see one. Clauses come in four types: main [or independent], subordinate [or dependent], relative [or adjective], and noun. Every clause has at least a subject and a verb. Other characteristics will help you distinguish one type of clause from another.