Affect as a verb (meaning to influence or impact):
* The new policy will affect the company's bottom line.
* The weather will affect our travel plans.
* Her words affected him deeply.
* The lack of sleep affected his concentration.
* The medication affected his mood.
Affect as a noun (meaning emotional response or outward expression):
* He had a flat affect, showing little emotion.
* Her affect was subdued after the news.
* The doctor observed the patient's affect closely.
* The study examined the affect of music on mood.
* Her stoic affect hid her inner turmoil.
Important Note: "Affect" and "effect" are often confused. Remember that "affect" is a verb (to influence), and "effect" is a noun (the result of an influence).