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A subordinating conjunction begins a subordinate clause. It connects the subordinate clause to the main clause and shows the relationship between the two. Examples of subordinating conjunctions include "although," "because," and "if."
Yes, a comma is generally needed when a subordinate clause begins with a subordinate conjunction. The comma is used to separate the subordinate clause from the main clause.
I will accompany you if you desire. If is the conjunction in this sentence.
"We" is not a conjunction. It is a pronoun, typically used to refer to oneself and others.
unlessuntil
The Upemba mud turtle is a reptile. It begins with U.
..
Ugli fruit begins with the letter "U".
Uruguay is a country in South America that begins with U.
When you join together it is called united. It begins with the letter U.
The word impromptu begins with i and ends with u.