1.sometimes是“频率副词”,表示“有时”“常常”“往往”,指某事只在某些场合会发生,并非在一切场合都发生。
2.sometimes可修饰动态动词、静态动词,多位于谓语动词之前或系动词之后,为了强调,也可位于句首或句末; 用于对比结构时也可位于谓语动词之后。
3.sometimes没有比较级和最高级。

用作状语
Old people sometimes lose their faculties.老年人有时会官能失灵。
I sometimes have letters from him.我有时收到他的来信。
I sometimes visit my grandmother.我有时去看我的祖母。
People in far northern countries sometimes form small houses out of blocks of ice.住在极北部国家的人有时用冰块建造小房子。
She likes sometimes the one and sometimes the other.她有时喜欢这个,有时喜欢那个。
That newspaper accounts of international affairs are sometimes distorted.那家报纸对国际事件的报道有时是歪曲事实的。
Destiny is sometimes cruel, but sometimes kind.命运有时是残酷的,但有时却是仁慈的。
The snake's bite is sometimes poisonous.蛇的唾液往往有毒。
Sometimes we are busy and sometimes we're not.有时我们忙,有时我们不忙。
I go there sometimes.我有时去那儿。
He seemed glad sometimes.有时,他显得很高兴。

sometimes, sometime, some time
这三者的区别是：sometimes的意思是“有时,间或”,指某事在某些场合会发生,并非在一切场合都发生; sometime指过去或将来的某一未知时间或某一尚未确定的时间点; some time则是名词短语,指时间段,意思是“一些时间”“某个时段”。例如:
People held in high repute are sometimes quite ignorant.名气大的人有时却非常无知。
Let's have dinner together sometime next week.下周找个时间我们一起吃顿饭吧。
I'll be away for some time.我要离开一段时间。
sometimes, always, often, usually
参见always条。

［同义词］   at times, now and then, occasionally
［反义词］   always, invariably