• Adjective: an adjective is a word whose main syntactic role is to qualify a noun or noun phrase, giving more information about the object signified. An adjective usually precedes the noun or the pronoun which it modifies.
  • Adverb: an adverb is a part of speech. It is any word that modifies any part of speech or other verbs other than a noun. Adverbs can modify verbs, adjectives, clauses, sentences and other adverbs.
  • Article: an article is a word that combines with a noun to indicate the type of reference being made by the noun. Articles specify the grammatical definiteness of the noun, in some languages extending to volume or numerical scope. The articles in the English language are the and a/an.
  • Auxiliary Verb: an auxiliary is a verb functioning to give further semantic or syntactic information about the main or full verb following it. Auxiliary can also called helping verb, helper verb, or verbal auxiliary.
  • Comparison: a comparison is a property of adjectives and adverbs; it describes systems that distinguish the degree to which the modifier modifies its complement. There are three levels of comparison: Positive, Comparative, and Superlative
  • Conjunction: a conjunction is a part of speech that connects two words, sentences, phrases or clauses together. In general, a conjunction is an invariable grammatical particle, and it may or may not stand between the items it conjoins.
  • Conditional Sentences: Conditional sentences are sentences discussing factual implications or hypothetical situations and their consequences. Full conditional sentences contain two clauses: the condition, and the consequence.
  • Gerund: A gerund is a term used to refer to the usage of a verb as a noun. The gerund is identical in form to the present participle (ending in -ing) and can behave as a verb within a clause, but the clause as a whole acts as a noun within the larger sentence. For example: Eating this cake is easy.
  • Infinitive: The infinitive of a verb is its basic form with or without the particle to. English language has three non-finite verbal forms: Bare Infinitive, Full infinitive (or to-infinitive), and the auxiliary verb (I asked not to have to).
  • Modal Verb: A modal verb (also modal, modal auxiliary verb, modal auxiliary) is a type of auxiliary verb that is used to indicate modality. Modal auxiliary verbs give more information about the function of the main verb that follows it.
  • Must vs Have to: Must means personal circumstance makes the obligation necessary (and the speaker almost certainly agrees with the obligation.). Have to means some external circumstance makes the obligation necessary.
  • Phrasal Verb: a phrasal verb is a combination of a verb and a preposition, a verb and an adverb, or a verb with both an adverb and a preposition, any of which are part of the syntax of the sentence, and so are a complete semantic unit. Sentences may contain direct and indirect objects in addition to the phrasal verb.
  • Preposition: a preposition is a part of speech that introduces a prepositional phrase. Simply put, a preposition indicates a relation between things mentioned in a sentence. Many style guides instruct that prepositions should not be placed at the end of a sentence unless it is necessary to maintain sentence structure or avoid awkward phrasing.
  • Pronoun: a pronoun is a pro-form that substitutes for a noun (or noun phrase), such as, the words it (substituting for the name of a certain object) and he (substituting for the name of a person). The replaced noun is called the antecedent of the pronoun.
  • Reported Speech: indirect or reported speech is a way of reporting a statement or question. A reported question is called an indirect question. Unlike direct speech, indirect speech does not phrase the statement or question the way the original speaker did; instead, certain grammatical categories are changed. In addition, indirect speech is not enclosed in quotation marks.
  • So vs Such