When must she go to the library?句中为什么不用goes?

When must she go to the library?句中为什么不用goes? When must she go to the library? when must she go to the school? She goes to the library.是什么 she often goes to the library There was a time when I hated to go to school 句中为什么用a 而不用the let him go to the shop为什么不用goes I __the book to the library.When _you_ it?第一句为什么用现在完成时,不用一般过 she must go to the library at a quarter past one She usually goes to the library on foot.(同义句转换) who usually goes to the supermarket为什么要用goes不用go The time goes fast,为什么用“goes”而不用“go”?