TWWL aims to increase confidence with grammar through recognizing how it can be manipulated in texts and explaining how it creates meaning. Key grammar concepts covered include morphology, syntax, semantics, and lexical features. Morphemes, words, phrases, clauses and sentences are defined. Dependent and independent clauses are distinguished, as are the four main sentence types: imperative, interrogative, emphatic, and declarative. Periodic sentences and punctuation of complex sentences are also discussed.