Alphabet is a standard set of letters or symbols in a fixed order used to represent of writing and speaking language. The English alphabet is consisting of 26 letters, from A to Z. ('A' is the first letter of the alphabet.)

An Article is a word as a determiner that indicates definiteness of a noun as general (indefinite article: ‘a’ or ‘an’) or specific (definite article: ‘the’).

Conjunction is a word used to connect words, phrases, clauses, sentences or to coordinate words in the same (e.g. and, but, if, while, or although. etc.).

Declaration is a formal, written, and official announcement. The declarative sentence makes a statement to relay information or ideas, and consists of the subject + verb with the end period. (e.g. The class starts from this Friday.)

A Definite Article is a determiner 'the' that introduces a noun phrase and implies to one particular thing (specific), or is common knowledge, or is about to be defined. (e.g. the book on the table). The definite article can be used with singular, plural, or uncountable nouns. Compare with indefinite article.

A Determiner is a modifying word that determines the kind of reference a noun or noun group has. Determiners can be specific or general, and function will be referring or qualifying. (e.g. a, the, my, every)

Exclamation is a more forceful version of a declarative sentence. The exclamatory sentence makes a statement, and conveys excitement or emotion with an exclamation mark (!) at the end. (e.g. Oh! We can’t wait anymore!)

A Glossary is an alphabetical list of terms with definitions or meanings.

Imperative is to give advice or instructions or that expresses a request or command. Imperative sentence describes form of a verb that is usually for giving order, desire, or wish. (e.g. Come here!)

An Indefinite Article is a determiner 'a' and 'an' that introduces a noun phrase and implies to a general or non-specific thing, or to introduce new concept. (e.g. I bought a book; Jon went to a public school). Compare with definite article.

Interrogative means a word used in questions, such as how or what. The Interrogative sentence is a type of sentence that asks a question and always ends in a question mark. (What’s your name?)

A Phrasal Verb is a verb that consist of a verb and other elements, typically a proposition or an adverb or a combination of both. The meaning of a phrasal verb is different from the combined means of the individual words.

Predicate is a part of a sentence containing a verb and explain or define the subject. (e.g. “is coming home” is a predicate in “Jon is coming home.”)

Punctuation is a special mark or symbol used in writing to separate phrases and sentences. (e.g. full stop, comma, brackets, and quotation marks)

Subject is a noun or noun phrase functioning as one of the main components of a clause, and is joined to a description by a verb as predicated. (e.g. Jon is a subject in “Jon is coming home.”)

A Vocabulary is the words exist and used in a particular language, subject or sphere of activity or on a particular occasion.

Word is a single distinct meaningful element of speech or writing, used with others or alone to form a sentence and typically shown with a space on either side when written or printed. (e.g. I don’t like the word ‘impossible', but I'm possible.)