Question

Jack,with his classmates,often ___(go)to the bookshop pn Sundays.

Answer 1

答案：goes。主谓一致的情况。当主语后面接由as well as, as much as, accompanied by, including, in addition to, more than,no less than, rather than, together with等引导的词组时，其谓语动词的形式要依主语的单复数而定。在这样的句子里，这些词所引导的词组不影响主语自身的单、复数形式，它们在句子里其实是状语。也就是说，我们完全可以将这些词组搬到句首或是放到句末去。从表面上我们也可以看出，它们与主语之间有"，"隔开。例如：
Petroleum, along with fuel gas, has recently risen in price.最近石油和燃料煤气的价格上涨了。
The teacher, with all his students, is going to have a picnic this weekend.老师打算这个周末与学生们一起去野炊。
The students, together with their teacher , are going to have a picnic this weekend.学生们打算这个周末与他们的老师一起去野炊。
The warehouse, with all its stockings, was burned last night.昨晚那个仓库连同其所有货物一起被烧毁了。
我们完全可以将上面句子中的那些词组都分别搬到句首或是放到句末去，因为它们在句子里是状语：
Petroleum has recently risen in price, along with fuel gas.
Along with fuel gas, petroleum has recently risen in price.
The students are going to have a picnic this weekend together with their teacher.
As well as the suitcase, the missing things have been found and returned to the owner.
The missing things have been found and returned to the owner, as well as the suitcase.

Answer 2

这里填上goes表示一般时态
注意，with his classmates这里只是个插入语，并不影响句子的谓语动词的
这个和and不要弄混，and是表示并列的，后面一般的就是复数，除了表示同一个人的情况用单数

Answer 3

goes
主语中有with, together with 等谓语动词应该跟这些词前的那个名词一致，也就是通常有人说的“就远原则”，所以用单数形式

Answer 4

goes 主语为jack