Questions: Prepositions and Conjunctions

Question 1

Can the phrase 'Because she studied hard' stand alone as a grammatically complete sentence?

• A. Yes — it has both a subject ('she') and a verb ('studied')
• B. No — the subordinating conjunction 'because' makes the clause dependent; it must attach to a main clause to be complete
• C. Yes, if you add a period at the end
• D. No — it is missing a direct object

Answer: (B)

A subordinating conjunction like 'because' creates a hierarchical relationship — it turns the clause into a dependent (subordinate) unit that cannot stand alone. 'Because she studied hard' signals that an explanation is coming, but the explanation only makes sense if attached to a main clause: 'Because she studied hard, she passed.' Option A is the classic trap: the presence of a subject and verb is necessary but not sufficient for a complete sentence.

Question 2

Which sentence uses a coordinating conjunction correctly?

• A. She was tired, because she ran far.
• B. She ran far, and she was tired.
• C. Although she ran far.
• D. She ran, or tired.

Answer: (B)

Coordinating conjunctions (FANBOYS: for, and, nor, but, or, yet, so) join two grammatically equal elements. Option B joins two independent clauses of equal rank with 'and' — correct. Option A uses 'because,' a subordinating conjunction, in a way that creates dependency rather than equality. Option C is a sentence fragment created by a subordinating conjunction with no main clause. Option D joins mismatched grammatical units (a verb and an adjective).

Question 3

A subordinating conjunction makes the clause it introduces grammatically dependent — that clause cannot stand alone as a complete sentence.

• T. True
• F. False

Answer: True

This is the defining feature of subordinating conjunctions (because, although, when, if, unless, etc.). They signal that the clause they introduce is subordinate — it explains, qualifies, or conditions the main clause but cannot function as a standalone sentence. This is what distinguishes subordinating from coordinating conjunctions, which join elements of equal grammatical rank.

Question 4

Prepositions join two independent clauses together, just like conjunctions do.

• T. True
• F. False

Answer: False

Prepositions do not join clauses — they express a relationship between a noun or noun phrase (the object of the preposition) and another element in the sentence, forming a prepositional phrase. 'On the table' is a prepositional phrase modifying a location, not a clause connector. Joining clauses is the job of conjunctions (coordinating or subordinating), not prepositions.

Question 5

What is the key difference between a coordinating conjunction and a subordinating conjunction?

Model answer: A coordinating conjunction joins two elements of equal grammatical rank — both can stand alone as independent clauses. A subordinating conjunction makes its clause dependent (subordinate), meaning that clause can no longer stand alone and must attach to a main clause to be complete.

The hierarchy is the key. 'She studied, and she passed' — both halves are independent; 'and' just links them. 'Because she studied, she passed' — the 'because' clause is dependent; remove the main clause and the sentence is incomplete. This distinction matters for punctuation, sentence combining, and understanding how complex sentences create logical relationships between ideas.