The objective of this book is to help English as a foreign language (EFL) or a second language (ESL) learners and teachers understand the fundamentals of English grammar that are most frequently and commonly used in an academic context. This text covers the following: (1) Tense (Present; Past; Future), (2) Aspect (Present Perfect; Past Perfect; Future Perfect), (3) Auxiliary (Modal) Verb, (4) Passive, (5) Determiner and Noun, (6) Pronoun, (7) Subject-Verb Agreement, (8) Infinitive, (9) Gerund, (10) Clause (Noun; Adjectival; Adverbial), and (11) Hypothetical If.