A subordinating conjunction joins a subordinate clause to a main clause.
The following is a list of the most common subordinating conjunctions.
| after | how | till ( or 'til) |
| although | if | unless |
| as | inasmuch | until |
| as if | in order that | when |
| as long as | lest | whenever |
| as much as | now that | where |
| as soon as | provided (that) | wherever |
| as though | since | while |
| because | so that | |
| before | than | |
| even if | that | |
| even though | though |
An adverb clause is always introduced by a subordinating conjunction. A noun clause and adjective clause sometimes are.
Adverb clause: Before you go, sign the log book.Noun clause: He asked if he could leave early.
Adjective clause: That is the place where he was last seen.
A subordinating conjunction is always followed by a clause. Many subordinating conjunctions can be other parts of speech.
Adverb:Jill came tumbling after.Preposition: Jill came tumbling after Jack.
Subordinating Conjunction: Jill came tumbling after Jack had fallen.