Summary
Highlights
A sentence is a medium to convey an idea. Before understanding sentences, one must grasp what a clause is: a combination of words with a subject and a verb. There are two types of clauses: independent (main clause, makes complete sense) and dependent (subordinating clause, relies on a main clause for meaning).
There are four main types of sentences: simple, complex, compound, and compound-complex. A simple sentence contains one independent clause. A compound sentence combines two independent clauses using coordinating conjunctions (FANBOYS). A complex sentence includes one independent and one dependent clause, joined by subordinating conjunctions. A compound-complex sentence consists of two or more independent clauses and one or more dependent clauses, using both coordinating and subordinating conjunctions.
Connectors, or linking words, enhance English speaking and writing by providing specific ways to explain, emphasize, correct, provide examples, particularize, dismiss, conclude, indicate time, show results, rank importance, express similarity, focus, contrast ideas, and sequence information. Examples include 'namely,' 'as a matter of fact,' 'rather,' 'for example,' 'in particular,' 'anyway,' 'in conclusion,' 'at first,' 'as a result,' 'most importantly,' 'similarly,' 'as for,' and 'however,' among many others categorized within 14 themes.
English grammar has 12 tenses divided into three broader categories: past, present, and future, each with simple, continuous, perfect, and perfect continuous forms. The simple present tense is used for regular habits, universal truths, permanent situations, movies/books, and directions. The present continuous tense describes actions happening at the moment of speaking, changing situations, or temporary situations. The simple past tense covers completed actions, series of past actions, and past situations that are no longer true. The past continuous tense sets a background scene for another past action or focuses on an activity's duration without emphasizing completion. Used to and would are also introduced for past repeated actions.
The present perfect tense describes tasks recently completed or past activities with relevance to the present, often using auxiliary verbs 'has'/'have' and the third form of the verb. It's used for unfinished time periods or unspecified past actions connected to the present. The present perfect continuous tense emphasizes the duration or process of an activity that started in the past and continues to the present. The past perfect tense describes an activity that happened before another past activity, using 'had' and the third form of the verb. The past perfect continuous tense focuses on the length of an activity that continued up to a certain point in the past, or past expectations that didn't materialize.
Articles (a, an, the) define nouns as specific or unspecific. 'A' is used before words starting with a consonant *sound* or abbreviations spoken as a single word. 'An' is used before words starting with a vowel *sound* or abbreviations spoken as individual letters. Both 'a' and 'an' are used when talking about a profession, indicating something for the first time, or with singular countable nouns. 'The' is for unique items, known objects/persons, superlatives, and specific proper nouns (oceans, rivers, country groups, mountain ranges, famous buildings, nationalities). The zero article is used before uncountable or plural nouns in general, names of people, countries (unless a group), cities, mountains, companies, and continents.
Determiners introduce nouns, indicating quantity, possession, or definiteness. This section focuses on demonstratives and quantifiers. Demonstratives (this, that, these, those) point out particular nouns, either near (this/these) or far (that/those), and can act as adjectives or pronouns. Quantifiers (some, any, each, every, many, much, more, little, a little, few, a few, fewer, less, no, not, neither, either, both, all, most, enough) specify the quantity or amount of a noun. Key distinctions are made between 'some' (positive/offers) and 'any' (negative/neutral questions), 'each' (individual) and 'every' (group as a whole), 'many' (countable) and 'much' (uncountable), and 'little/few' (small quantity) versus 'a little/a few' (some quantity).
Parts of speech define a word's purpose in a sentence. Nouns name a place, person, or thing; types include proper, common, collective, possessive, and compound nouns. Pronouns replace nouns, with types like reflexive, indefinite, possessive, and relative pronouns. Verbs express actions or states of being, classified as helping, action, or linking verbs. Adjectives modify nouns and pronouns, describing qualities or quantities. Adverbs qualify verbs, adjectives, clauses, or other adverbs, answering questions like 'when,' 'how,' 'why,' or 'where.' Conjunctions connect words, clauses, or sentences, categorized into coordinating (FANBOYS), subordinating, and correlative. Interjections express emotions and are followed by an exclamation mark. Prepositions show the relation of a noun/pronoun to other words, indicating position or time.
In active voice, the subject performs the action (subject-verb-object). In passive voice, the subject is acted upon by the verb (object-verb-subject). Passive voice is preferred when the subject is missing, given less importance, or not mentioned at all. To convert active to passive, change the main verb to its third form, add an auxiliary verb, and place 'by' before the subject (though 'with' or 'to' may be used in specific cases).
Direct speech conveys a speaker's exact words, marked by a comma and quotation marks. Indirect speech conveys the message in one's own words without changing the meaning. Conversion rules include adding a connector ('that'), changing pronouns, and shifting tenses to the past. However, if the reporting clause is in the present or future tense, the reported verb's tense remains unchanged. Time expressions ('today,' 'tomorrow') also change in indirect speech. Imperative sentences, interrogative sentences, exclamatory sentences, and modal verbs have specific conversion rules.
Modal auxiliary verbs (modals) like 'can' and 'could' express ability, possibility, permission, requests, offers, orders, and more. 'Can' indicates ability (present), common/typical things, possibility at a moment, asking/giving permission, and offers/orders (informal). It cannot be used for chances. 'Could' expresses past ability, polite requests/offers, and ability to do something but not attempting it (often with 'have' + past participle). It's also used for criticism, polite permission, and indirect speech. 'Could' cannot be used for a single past action.
'May' and 'might' are modal verbs with distinct uses. 'May' expresses chances (present/future), contrasting ideas (often with 'but'), 'nothing better to do' (with 'as well'), and permission (first person only). It's not used for direct questions about chances but can be used indirectly. 'Might' implies a smaller chance than 'may', denotes conditional meanings, and is the indirect speech form of 'may'. It's also used for situations that were possible but didn't happen, formal permission, and to criticize past actions. Both can indicate something true that makes no difference to the outcome.
'Will' serves as a future auxiliary, expressing certainty/confidence, giving orders or making requests, inquiring about wishes, and indicating willingness/decisions. The shortened form is 'll. 'Would' is the polite version of 'will' and describes past actions that didn't take place. It is the past form of 'will' and is used in indirect speech. 'Would' also signifies typical past behavior and is essential in conditional sentences. The difference between 'will' and 'want' for wishes is that 'will' implies action, while 'want' is merely a thought.
This section highlights ten frequent English mistakes: 1) Confusing 'their' (possessive) and 'there' (place). 2) Incorrectly using 'percentage' (no number) and 'percent' (with a number). 3) Misusing 'do' (plural/I) and 'does' (singular). 4) Distinguishing 'accept' (agree) from 'except' (exclude). 5) Using 'since' (starting point) versus 'for' (duration). 6) Incorrect usage of 'gone' (with auxiliary) and 'went' (no auxiliary). 7) Mixing up 'its' (possessive) and 'it's' (it is). 8) Differentiating 'blunder' (careless mistake) from 'mistake' (accidental error). 9) Improper self-introduction ('myself Ash' vs. 'I am Ash'). 10) Over-reliance on short forms and abbreviations in formal communication.