Affect or Effect ฝ่ายวิชาการคณะฯ Affect is almost always used as a verb. Effect is almost always used as a noun. Use effect when talking about a result. Example: What effect did the loss have on the team? ..when one of these words is used: into, no, take, the, any, an, or and. Example: The prescribed medication had no effect on the patient's symptoms. Example: In analyzing a situation, it is important to take the concepts of cause and effect into consideration. …when describing something that was caused or brought about (use as a verb; rarely). Example: The new manager effected some positive changes in the office. Use affect when trying to describe influencing someone or something rather than causing it. Example: How does the crime rate affect hiring levels by local police forces? Example: The weather conditions will affect the number of people who come to the county fair this year. Affect can be used as a noun (rarely) to describe facial expression. Example: The young man with schizophrenia had a flat affect. Example: The woman took the news of her husband's sudden death with little affect. http://www.yourdictionary.com/grammar-rules/affect-effect-grammar.html