sometimes sometime some times some time

题目

sometimes sometime some times some time
.he walks to school.
i'll see you.next week.
i have been to Beijing.
piease wait for me for.
用标题上的四个单词填空,最好把理由说出来.

答案

Sometimes
sometime
some times
some time
sometimes是频率副词,是“有时候”的意思
sometime是指（未来或过去的）某个时间,是时间副词
time做名词也可以表示“次、回”的意思,是可数名词.some times就是“几回”.
time做名词还有“时间、时段”的意思,是不可数名词,所以some time就是“一段时间、一会儿”的意思.
呃.其实讲的并不完全准确,但是这样比较好理解.