I sometimes stay in bed until lunchtime.为什么sometime要加s

I sometimes stay in bed until lunchtime.为什么sometime要加s I sometimes stay in bed until lunchtime中,为什么在sometime+s呢? I sometimes stay in bed until lunchtime. 关于until的用法I sometimes stay in bed until lunchtime和I sometime I sometimes stay in bed until lunchtime.是否可以改写成 Sometimes,I I sometimes stay in bed until lunchtime.这句话属于简单句中的哪种结构? 新概念英语2第二课有句话是 I sometimes stay in bed until lunchtime. I stay in bed until lunchtime.中stay为____动词 stay in bed until lunchtime的连读 i sometime __(still/stay) in bed __(on/until) luntchtime. i never gets up early()Sunday.i sometimes stay in bed until so he must stay in bed for a week.句中stay为什么不加s