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§ 2. The compound sentence is derived from two or more base sen-
tences which, as we have already stated above, are connected on 
the principle of coordination either syndetically or asyndetically. 
The base sentences joined into one compound sentence lose their 
independent status and become coordinate clauses — parts of a 
composite unity. The first clause is "leading" (the "leader" clause), 
the successive clauses are "sequential". This division is essential 
not only from the point of view of outer structure (clause-order), 
but also in the light of the semantico-syntactic content: it is the se-
quential clause that includes the connector in its composition, thus 
being turned into some kind of dependent clause, although the type 
of its dependence is not subordinative. Indeed, what does such a 
predicative unit signify without its syntactic leader? 
The coordinating connectors, or coordinators, are divided into con-
junctions proper and semi-functional clausal connectors of adver-
bial character. The main coordinating conjunctions, both simple 
and discontinuous, are: and, but, or, nor, neither, for, either ... or, 
neither ... nor, etc. The main adverbial coordinators are: then, yet, 
so, thus, consequently, nevertheless, however, etc. The adverbial 
coordinators, unlike pure conjunctions, as a rule can shift their po-
sition in the sentence (the exceptions are the connectors yet and 
so). Cf.: 
Mrs. Dyre stepped into the room, however the host took no notice 
of it. → Mrs. Dyre stepped into the room, the host, however, took 
no notice of it. 

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The intensity of cohesion between the coordinate clauses can be-
come loose, and in this case the construction is changed into a cu-
mulative one (see Ch. XXVI). E.g.: Nobody ever disturbed him 
while he was at work; it was one of the unwritten laws. 
As has been stated elsewhere, such cases of cumulation mark the 
intermediary status of the construction, i.e. its place in syntax be-
tween a composite sentence and a sequence of independent sen-
tences.