The "Gym" for English Grammar: A Review of English Sentence Structure
Because Krohn’s approach is rule-based and hierarchical, his sentence structures can be directly translated into parse trees. Some computational linguists have used the “new” PDF as a gold standard for testing English parsers.
Here’s the reality. Most intermediate learners hit a plateau because they can understand individual sentences but cannot produce complex, native-like structures. Textbooks offer “rules of thumb,” but Krohn offers a .
Lessons on passive voice, conditional sentences (if/unless), and various types of clauses (adjective, adverb, and noun). Coordinated Learning
: Detailed lessons on present, past, and future forms.