The child begin his lessons at eight o'clock.有没有错,begin要加s吗?

The child begin his lessons at eight o'clock.有没有错,begin要加s吗? The students begin lessons at eight o'clock（对划线提问） 划线部分是：at class ______(begin)at eight o'clock. The frist class begin at eight O' （L）begin at eight o'clock.首字母填空 clsses begin at eight o'clock为什么用clsses? We begin our classes at eight o'clock in the moring 是什么意思?急! is,it's,the,in,at,evening,time,o'clock,begin,begins,six,what the concert will begin at 8 o'clock(同义句) mary work at a bank.she begin working at eight o'clock in th 短句改错:Mary works at a bank.she begin at eight o'clock mary works at a bank.she begin working at eight o'clock in t