some information is/are

English as a Second Language English Vocabulary, Grammar and Idioms
1

Happy New Year!

Please help me correct following sentences or suggest another one. (I’m trying to notice my email recipient that there are attachments.)

  1. Some additional information is also attached to this email. Please check if it is sufficient.
    (My question: I actually attached two files. It is proper to use “it is” in the 2nd second sentence?)

  2. Some additional information are also attached to this email. Please check if they are sufficient.
    (My question: I think “some additional information” is singular. Using “are” must be wrong.)

  3. Some additional information is also attached to this email. Please check if they are sufficient.

  4. Some additional information is also attached to this email as files. Please check if they are sufficient.

Thank you.

Justin

2

I believe you mean
“I’m trying to notify the recipient of my email that there are attachments.”

  1. Some additional information is also attached to this email. Please check if it is sufficient.

  2. Files containing additional information are also attached to this email. Please check if they are sufficient.

3. Some additional information is also attached to this email. Please check if they are sufficient.

  1. Some additional information is also attached to this email in the form of files. Please check if they are sufficient.