"Since" is a conjunction, and "while" can function as both a conjunction and a noun.
"since" is not a preposition. It is a conjunction.
subordinate conjunction
No, "since" is not a preposition. It is typically used as a conjunction or an adverb.
Coordinating conjunction.
"Since" may be used as a conjunction. It can also be an adverb and a preposition.
Since is an adverb, preposition or a conjunction As an adverb - she at first refused, but has since consented... As a preposition - It has been warm since noon'... As a conjunction - He has been busy since he came...
no, it is not.
"For" can be used as a conjunction to introduce a reason or explanation for something. For example, "She was late for work, for her car broke down on the way."
No, it is not a conjunction. It is a noun, a type of tree.
"Whenever" is a subordinating conjunction, linking a dependent clause to an independent clause in a complex sentence.
for as a conjunction - since
subordinate conjunction
The word since is a conjunction, and has no plural.
The conjunction "or" is a coordinating conjunction.
It is not a conjunction. It is either a preposition (with object) or an adverb.
The conjunction is "but", and it is a coordinating conjunction.