English words have one main stressed syllable, which is pronounced more strongly, slightly longer, and often with a clearer vowel than the other syllables. Unstressed syllables often reduce to a weaker vowel sound, typically the schwa, especially in longer words. Stress placement can be fixed in some words and variable in others, especially when prefixes and suffixes are added. Correct word stress helps listeners identify the word and reduces misunderstandings. In dictionaries, the main stress is marked with a symbol before the stressed syllable.

Rule
Every English word has one main stressed syllable.
The main stressed syllable is pronounced longer and clearer.
Unstressed syllables often use the schwa sound.
Changing stress can change word type or meaning.

Many two-syllable words in English have predictable stress patterns based on their word class. Two-syllable nouns and adjectives usually stress the first syllable, while two-syllable verbs and prepositions often stress the second syllable. Longer words often place stress based on familiar suffixes, such as -ion or -ity, which tend to attract stress to the syllable before the suffix. Compound nouns usually stress the first part, while compound adjectives and verbs may stress the second part. These patterns provide a starting point, but there are exceptions that must be memorized.

Rule
Two-syllable nouns usually stress the first syllable.
Two-syllable verbs often stress the second syllable.
Words with -ion often stress the syllable before -ion.
Compound nouns usually stress the first word.

In English sentences, content words such as nouns, main verbs, adjectives, and adverbs usually receive sentence stress. Function words such as articles, prepositions, pronouns, and auxiliary verbs are usually unstressed and can be reduced in pronunciation. Sentence stress creates a rhythm of stressed and unstressed words, which makes speech sound natural and easy to follow. The pattern of sentence stress helps listeners identify the important information in a sentence. Maintaining sentence stress supports both clarity and fluency in conversation.

Rule
Content words usually receive sentence stress.
Function words are usually unstressed and can be reduced.
Sentence stress creates a regular rhythm in English.
Stressed words carry the main meaning in a sentence.

Intonation is the rise and fall of pitch across a sentence, signaling meaning and structure. In statements, English typically uses falling intonation at the end, signaling completion. Yes–no questions often use rising intonation at the end, signaling that a response is expected. Wh– questions usually use falling intonation, because the speaker is seeking specific information. Intonation works together with stress to guide the listener through the message.

Rule
Statements usually end with falling intonation.
Yes–no questions often end with rising intonation.
Wh– questions usually end with falling intonation.
Intonation marks completion or expectation in a sentence.

Speakers can change the meaning of a sentence by shifting stress to a different word. The stressed word becomes the focus, highlighting new, important, or contrasted information. This shift is called focus and is marked by making the target word louder, longer, and often higher in pitch. In conversation, focus helps manage what is given and what is new to the listener. Effective emphasis supports clear communication and avoids ambiguity.

Rule
Shifting stress changes which word is in focus.
The focused word is pronounced louder, longer, and often higher.
Focus highlights new or contrasted information.
Emphasis guides the listener to the intended meaning.

The schwa is the most common vowel sound in English and occurs in unstressed syllables. It is a short, relaxed sound, typically pronounced in the middle of the mouth. Schwa appears in many function words and in the unstressed syllables of longer words. Using schwa correctly supports natural rhythm and makes speech easier to understand. Overpronouncing unstressed vowels can disrupt word and sentence stress.

Word	Notation	Description
about	əˈbaʊt	The first syllable is schwa because it is unstressed.
support	səˈpɔrt	The first syllable is schwa because the stress is on the second syllable.
banana	bəˈnænə	The first and last syllables are schwa because they are unstressed.

In some English words, changing the stress changes the meaning or the grammatical category. This pattern is common in two-syllable words that can be both nouns and verbs. The noun form usually stresses the first syllable, and the verb form usually stresses the second syllable. Recognizing this difference helps with both speaking and listening. Accurate stress signals the intended meaning to the listener.

Word/Phrase	Definition
record	The noun has stress on the first syllable and means a thing that is kept as information.
record	The verb has stress on the second syllable and means to capture audio or video.
permit	The noun has stress on the first syllable and means an official document.
permit	The verb has stress on the second syllable and means to allow.
conduct	The noun has stress on the first syllable and means behavior.
conduct	The verb has stress on the second syllable and means to lead or direct.

English stress relies on clear word stress, predictable patterns for common word types, and sentence stress that highlights content words. Schwa supports natural pronunciation by reducing unstressed syllables. Intonation and emphasis work with stress to convey meaning and guide the listener. Mastering these patterns improves both clarity and fluency in spoken English.