Sometimes the craft is heavier than air, and sometimes lighter.

有飞行器比空气重, 有轻。

Others appeared brighter at times and less bright at others.

而其他行星看上去有亮些，有又怎么亮。

Sometimes it helped, but sometimes it didn't.

有见效，但有。

Now and then I do. Now and then I don't.

有我收费，有我收费。

There was no acting required on certain occasions.

所以，有候，完用我去表演。

Because sometimes there's two sometimes there's three sometimes four, sometimes five.

因为有是两个，有是三个，有是四个，有是五个。

It's something written down – sometimes not even written down.

有文，有甚至都没被写下来。

Sometimes the fighting increases, they say, sometimes it slows down.

他们说，战斗有会加剧，有会放缓。

I suppose I can be a little bit careless sometimes.

我觉得我可有大细心。

Sometimes I go to a video arcade instead.

有我去像厅而去上课。

Sometimes, you can use stative verbs sometimes in the continuous form.

有候，静态动词有也用进行。

Sometimes they tell their wife, sometimes they don't.

有他们会告诉他们的妻子，有候会。

Sometimes she rides by herself, other times with her husband and children.

有候独自一人骑行，有和丈夫孩子一起。

Sometimes government does a good job, they say, and sometimes not.

他们觉得政府有候做得好，有候差点。

Sometimes I run with my husband, or sometimes I just go by myself.

有我和我丈夫一起，有候就自己去。

Sometimes I would ride my bicycle. Sometimes I would ride my car.

“有候我会骑自行车。有我会开车。

Sometimes 'of course' is polite and sometimes it's not.

有 of course 是礼貌的，有则是。

My neighbor's eccentric behavior is sometimes frightening.

我邻居的古怪行为有令人恐惧。

Sometimes people just lift a finger and that's enough.

有候，人们只要举手之劳就够了。

For us to identify, let's say a feather or maybe to identify the bones.

我的的鉴别工作有候会是羽毛，有候是鉴别骨头。