Can you give us the sentence, please?
<span>Speculate, in terms of the microscopic surface irregularities, about why µk<µs, and what effect a lubricant has on the coefficient of friction</span>
A comma should follow a dependent clause when the dependent clause come first in a sentence.
When seperating the two clauses, always use a comma.
Answer:
I did not pay attention to to the music.
I do not pay attention to to the music.
i won't pay attention to the music.
