Irregular Past Tense Verbs
Is vs Are
Have vs Has
Was vs Were
Irregular Plural Nouns
Pronouns
Space/Location Concepts
Quality Concepts
Time Concepts
Quantity Concepts
Auditory Comprehension
Articles A vs An
WH questions (What, When, Where, Who, Why)
Synonyms and Antonyms
Conjunctions (Coordinating, Subordinating, Correlative)
Pragmatics/Social Language