Grade 4 Fall — Persuasive/Argument Writing, Compound-Complex Sentences, Relative Clauses, and Modal Auxiliaries
English · GR G4 eng.g4.f.gr.compound_complex_sentences

Produce compound-complex sentences (L.4.1.f) using coordinating + subordinating conjunctions

Combine TWO independent clauses (joined by a FANBOYS coordinator with comma before) WITH AT LEAST ONE dependent clause (joined by a subordinator like because, although, when, if, since, while, whereas, until, before, after). Apply comma rules: comma before FANBOYS; comma after fronted dependent clause. Avoid run-ons (no missing comma+coordinator) and fragments (no orphaned dependent clause).

Mastery threshold
90%
Min instances
14
Typical minutes
40
Spaced intervals (days)
1, 3, 7, 14, 30, 60
Prereqs
Successors
  • eng.g5.f.gr.complex_sentence_layered
    (not yet loaded)
  • eng.g4.s.gr.syntactic_variety_extended
    (not yet loaded)
Common misconceptions
  • Writes a comma-splice run-on ('Students need recess, teachers report better focus.') instead of using a coordinator with the comma.
  • Treats a long simple sentence as 'compound-complex' — counts adjectives or prepositional phrases as 'clauses' when there is still only one subject-verb.

Exercise pool (2)

Diff Stem Type
4 Build 3 compound-complex sentences about your topic. Use 3 different patterns: (1) FRONTED DEP + IND + FANBOYS + IND. (2) IND + FANBOYS... build compound complex
4 Build 2 compound-complex sentences about your research topic. Each: ≥2 INDEPENDENT clauses (joined by FANBOYS with comma) + ≥1 DEPENDENT... compound complex in research context