what does s, f,scs, scv mean when indentifying(labeling) sentences

thanks

S-simple sentence

f-fragment (meaning that it is not a complete senetence)
scs-simple compound subject (meaning there are two subjects in the sentence)
scv-simple compound verb (meaning there are two verbs in the sentence

Sentence fragment sentence compound subject sentence compound verb

https://www.shurley.com/pdf/hs/abbreviations/level_5_abbreviations.html

what does scv mean?

S,SUV,scs,f

Love

Before the end of this chapter.