这里为什么要加sMy wife and I walking along the banks of the river.bank为什么要加s呢?是因为My wife and I是两个人么

这里为什么要加sMy wife and I walking along the banks of the river.bank为什么要加s呢?是因为My wife and I是两个人么 my english teacher's voice sounds中sound为什么要加sMy English teacher's voice sounds nice and gentle sound为什么加s my wife and i are walking along the banks of the river为什么不是bank?bank这里是河岸的意思,为什么要加S?在书上看到的这句. My wife and I are walking along the banks of the river中的 bank 为什么要加s? My maths is just a mess. 为什么加sMy i s just a mess.maths 为什么加s my wife is walking along the banks of the river.这里的bank 为什么要加S请解释的明白点谢谢 he and his wife watch television为什么watch不加s he and his wife watch TV,为什么watch不加s everybody wants you 这里为什么want要加speople come and see me everyday 这里的come不加s Charlie left first,off to the police station that was his wife and family.这里如果不加逗号 Charlie left first off to the police station that was his wife and family.这样行不行 his wife was surprised and said中间我们加AND this saves money and reduces pollution and waste going into the environment这里为什么go into 要加ing,为什么? Mr.Sawyer usually reads his newspaper,but sometimes he and his wife watch television.watch 前面为什么不加are? just finished,and finishing up things for tomorrow这里的finishing 为什么要加ing哦 He took his wife to the cinema once a week.这里为什么加the 为什么用to`换成go to cinema可以吗 He took his wife to the cinema once a week.这里为什么加the 为什么用to`换成go to cinema可以吗 Mr.jones and his wife are looking at them.这里为什么用ARE 和AT.特别是AT,为什么不直接去掉AT? 姐姐 请问ifteen minute passed and then 这里的then不是副词吗?为什么要加and啊?