Definitions

And is used to join two or more words, phrases, or related sentences together. But is used to show a contradiction, an exception, or an objection.

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When is and used?

And is used to join two or more words, phrases, or related sentences together.  For instance, – Sam bought apples, oranges, and peaches from the farm. – I love cats and dogs. – It was midnight and time to celebrate her birthday.

When is but used?

But is used to show a contradiction, an exception, or an objection. For instance, – He certainly won the cash prize but did not deserve it. – It is late, but I will still take a bus to work. – Everyone but Sarah is allowed to dance today.

Tips to Remember

Incorrect: We studied the side effects of the steroid, but the result was as expected. Correct: We studied the side effects of the steroid, and the result was as expected. Incorrect: Iron and copper are reactive elements, and neon is not. Correct: Iron and copper are reactive elements, but neon is not.