paulaalv11
Hi Kunal,
in general additive subjects take the form of the main part of the subject -in your case, this would be children-.
An example:
John together with Peter is going on vacation.However, you would write:
John and Peter are going together on vacation.
I believe what's confusing you is that the main part of your example is plural ("children") and that's why the verb takes the plural form. In conclusion, yes, your sentence is correct, but not because of the additive phrase in the subject -only because the main part of the subject is plural itself.
I hope this helps! Please let me know

Cheers, and best luck for your studying!
Hi
How do we know about the main subject ? Is it the first subject in the sentence ?
For example:- Cats along with dogs are sitting on the carpet.
In this sentence both subjects are plural. So are goes well with both.
What if the sentecnes were like this-
Cats along with the dog is/are sitting on the carpet.
Cat along with dogs is/are sitting on the carpet.
Based on my understanding, the additive phrase is modifying first subject cat/cats in both cases. So IMO we will take are in first and is in second sentence.
Which cases are correct in above sentences and how do you identify the main subject ?
Also, how does subject-verb agreement follow after identification of the subject ?