Is since a subordinating conjunction

A conjunction is a word, or words, used to connect two clauses together.

Words such as 'although', 'because' or 'when' .

A subordinating clause is a part of a sentence that adds additional information to the main clause.

A subordinating conjunction is simply the word/words that is used to join a subordinating clause to another clause or sentence.

For example:

By adding 'because' we can link the subordinating clause "the train had stopped" with the main clause "He was annoyed".

Subordinate conjunctions (and clauses) can be used in different places within a sentence.

They can go at the start, middle or end of a sentence.

In the example below a subordinate clause has been used at the end of a sentence:

.

You can reorder the sentence so the subordinate clause is used at the start:

Here, the subordinate conjunction &

is now that a subordinating conjunction

is after that a subordinating conjunction