这句话为什么要加S.Lacks confidence and poise is nervous and ill at ease.lacks为什么加S.

这句话为什么要加S.Lacks confidence and poise is nervous and ill at ease.lacks为什么加S. You visit yourgrandmother on Sundays. Sundays这里的“s”为什么要加,如果不加“s”,这句话对吗? beauty saves the world中的save为什么要加s这句话怎么翻译save不用加s Does she play sports every day?为什么这句话中的sports要加S He loves the mystical 请问这句话怎么翻译?为什么love要加S? my watch keeps good time.这句话到底谁是主词,为什么keep要加S Water freezes below zero.这句话中freeze为什么要加s,回答必采讷! 这句话为什么要加been啊 there's obviously just been a little mistake. others are lying on the beach.这句话中other为什么要加S as everyone sees ,see为什么要加S这句话是什意思？ 请问这句话为什么bring要加s?what brings you to washington,dc? It’s one of China's most popular dishes.这句话中,为什么one of 后没加定冠词the?为什么dish要加s? In the life certainly does not lack America,only is lacks discovers the beautiful eye.这句话里为什么用America?中文不是“生活中并不缺少美,只是缺少发现美的眼睛”么? 除了复数的情况外,什么情况下单词后面加S?例:He lives by his pen.这句话中的live为什么要加s?还是不太懂. 2.Can you point to the clothes he needs?这句话中的need为什么要加s? what do you think makes a good baseball player?帮忙分析一下这句话为什么make要加s呢? what are your attitudes towards using english?1、这句话中toward 为什么要加s呢? 请问这句话中he's＼是什么缩写?还有read的后面为什么要加ing?