The verb "becomes" is correct in that sentence. (I don't see "is becomes" there.)
Also, "not only" is placed correctly, after the verb. I agree with you that "but also" is the correct wording.
guidetogrammar.org/grammar/conjunctions.htm#correlative_conjunctions
When you add sugar to it, your cup of coffee becomes not only sweet, also fattening.
Which word used incorrectly in the sentence?
The answer: is becomes.
But there is a bit off about where "also" after the comma. I think it should be "not only..., but also"
And should "becomes" placed behind "not only"?
Please, someone help me. Thank you!
1 answer
1 answer