I'd have nightmares thinking they were being ridden with saddle galls and not groomed properly.是什么意思？

I'd have nightmares thinking they were being ridden with saddle galls and not groomed properly.

我一想起它们背上长了鞍疮和喂养得不好就要犯梦魇的.

have

aux. 用以构成完成式及完成式的不定式，表示已经…；vt. 有，具有，拿，取得，从事，必须，不得不；n. 〈口〉有产者，有钱人，富国，〈英俚〉欺骗，诈骗；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

Nightmares

n. 噩梦( nightmare的名词复数 )，<口>可怕的事情，无法摆脱的恐惧；

例句
He has nightmares about the tanks imploding.
他老是做油箱爆炸的噩梦。

thinking

n. 思考，想法，思想，意见，见解；adj. 有思想的，有理性的；v. “think”的现在分词；

例句
Into her nineties, her thinking remained acute and her character forceful...
虽已年届九旬，她依然头脑敏锐，个性很强。

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

being

n. 存在，生物，人，要素，本质；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

ridden

adj. （通常构成复合词）充满（某种不良事物）的，满是的，受…困扰的，ride 的过去分词；v. 乘，骑，驾( ride的过去分词 )，（骑马、自行车等）穿越，搭乘，飘浮；

例句
The gunman escaped on a motorcycle being ridden by an accomplice.
持枪歹徒坐上一辆由同伙驾驶的摩托车逃逸。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

saddle

n. 马鞍，（自行车或摩托车的）车座，鞍形架，鞍状物，（动物的）脊肉；vt.& vi. 给（马）装鞍；vt. 使承担；

例句
Why don't we saddle a couple of horses and go for a ride?
我们何不找几匹马套上马鞍出去遛遛？

galls

v. 使…擦痛( gall的第三人称单数 )，擦伤，烦扰，侮辱；

例句
Crown galls are cancerous growths composed of disorganized and proliferating plant cells.
冠瘿是无组织的正在不断增殖的植物细胞所组成的癌状物.

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

groomed

v. 照料或梳洗（马等）( groom的过去式和过去分词 )，使做好准备，训练，（给动物）擦洗；

例句
We were amused to see how assiduously the animal groomed its fur.
看着这只动物如此认真地梳理自己的毛，我们被逗乐了。

properly

adv. 适当地，恰当地，正确地，完全，非常；

例句
The child seat belt was not properly anchored to the car.
儿童坐椅的安全带并未在车上固定到位。