第四题中为什么stay要加s啊
so he must stay in bed for a week.句中stay为什么不加s
He must stay at home.句中的stay要加s吗?为什么?
I sometimes stay in bed until lunchtime.为什么sometime要加s
During my summer holidays,l stay in Kunmin中的holidays为什么要加s
I stay at home on Saturdays 为什么星期六加s
stay at home为什么要加at?
I think staying at home is really boring 中stay为什么要加ing?
stay++up++为什么stay加ing
I usually stay home at night.stay home 中home前面为什么不用加at?
we'll stay at the best hotels.这句话中的hotels为什么 加s?
第三题friends为什么要加s
为什么有些英语句子中有的单词后面要加S有的不加s