I am discussing the most common use of the words:
Some of the most common uses of effect (when it is a noun) are:
- Exposure to the sun had the effect of toughening his skin. (here it means 'result')
- His protest had no effect (here it means 'influence')
- This law will come into effect in 2015. (here it means 'the state of being effective or operative')
affect is commonly used as a verb in the following ways:
(note: it is used with an object)
meaning: to act on; produce an effect or change in:
Cold weather affected the crops.
People became homeless in flood affected areas.
Cancer had seriously affected his lungs.
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