Rules for Comma Usage. Tip #4: Comma Before But
Use a comma before the word but if it is joining two independent clauses:
Incorrect: Cleo is a good singer but she’s an even better dancer.
Correct: Cleo is a good singer, but she’s an even better dancer.- Клео-хорошая певица, но танцовщица она еще лучше.
If but is not joining two independent clauses, leave the comma out.
Incorrect: My teacher is tough, but fair.
Correct: My teacher is tough but fair.- Мой учитель жесткий, но справедливый.
Incorrect: Life is, but a dream.
Correct: Life is but a dream.- Жизнь – всего лишь сон.