这里为什么要加sMy wife and I walking along the banks of the river.b

这里为什么要加sMy wife and I walking along the banks of the river.b my wife and i are walking along the banks of the river为什么不是b my wife is walking along the banks of the river.这里的bank 为什么要 my wife and i are walking along the banks of the river. My wife and I are walking along the banks of the river.其中ban My wife and I are walking along the banks of the river.我和妻子正 My wife and I are walking along the banks of the river,英语中主语 My wife and I are walking along the banks of the river中的 ban my wife and I are walking along the banks of zhe river. 2,l,wife,and,my,along,river,of,banks,along,are,the,walking My wife and I are waking along the banks of the river.句子中为什么 We are walking along the banks of the river为什么bank要加S