Where do I Put Word Stress?
There are some rules about which syllable to stress. But...the rules are rather complicated! Probably the best way to learn is from experience. Listen carefully to spoken English and try to develop a feeling for the "music" of the language.
When you learn a new word, you should also learn its stress pattern. If you keep a vocabulary book, make a note to show which syllable is stressed. If you do not know, you can look in a dictionary. All dictionaries give the phonetic spelling of a word. This is where they show which syllable is stressed, usually with an apostrophe (') just before or just after the stressed syllable. (The notes at the front of the dictionary will explain the system used.) Look at (and listen to) this example for the word plastic. There are 2 syllables. Syllable #1 is stressed.