Student or Learner
Anu, as well as his friends is guilty. Here “is”or “are”In my knowledge it is “are” but here, I see such type of sentence in grammer books.
I am not a teacher.
You need another comma: Anu, as well as his friends, is guilty. The short answer is "is". "As well as his friends" is parenthetical. It is as though it was in parentheses: Anu (as well as his friends) is guilty. If the matter is actually in parentheses, there is no problem. Matter within parentheses stands outside the sentence and has no effect on the grammar or punctuation of the sentence. When you set off the parenthetical matter with commas, though, there is the temptation to read it as a compound subject (Anu and his friends).
If you must make his friends parenthetical, you are stuck with "is" whether you think it sounds right or not. If you don't like how "is" sounds, get his friends out of the parenthetical: Anu and his friends are guilty.
(1) I know how confusing this matter can be.
(2) Here are some examples that may be helpful. (I shall credit
my sources presently.)
(a) The pilot, as well as the co-pilot and navigator and all the gunners, was eager to get off for the attack.
(b) Five members of the class, including John, were going to camp for the summer.
(c) Miss Walsh, with her two sisters, has gone to visit friends.
(d)The star, as well as the producer and the director, was a little nervous on opening night.
(e) Your conduct, in addition to your poor marks, makes you ineligible.
(f) Jim, not Jose and his friend, is coming with me.
(g) John, together with James and William, was late.
(h) Inflation as well as taxes influences voters. (Some experts
say that commas are not necessary with "as well as." I think that
most experts suggest that you use commas.)
John C. Hodges, Harbrace College Handbook (New York: Harcourt
Brace Jovanovich, Inc., 1972).
John E. Warriner and Francis Griffith, English Grammar and Composition
(New York: Harcourt Brace Jovanovich, 1977).
Edwin C. Woolley, Franklin W. Scott, and Frederick Bracher, College Handbook of COMPOSITION (Boston: D.C. Heath and Company, 1951)
P.S. Mr. Michael Swan in his 1995 edition of Practical English Usage
has some interesting comments.
(a) Mr. Swan gives this example: Alice, as well as Paula, was shocked by the news.
(b) He then says that there are exceptions to the rule: some authors do not use commas and they do use the plural verb if there is a longer subject:
His appearance as well as his strange way of talking make me suspicious.