Some time ago为何time不加s

Some time ago为何time不加s after some time 没什么 不加s、 spend some time, time 能不能加S some time ago 翻译 have no more time.time为什么不加s? a few years' time中的year为何要加s' a few years time中的year为何要加s some years ago 和long time ago一样吗 英语中time什么情况加s,什么情况不加s?fish什么情况加s,什么情况不加s?time和f long time ago 前面一定要加 a 也就是一定是 a long time ago Some time ago,an interesting discovery was made by archaeolo Another time some months ago,是定语从句吗