It can be done, and is done, however. From the reading I've been doing, it is possible, although very difficult, to train a zebra to be ridden or to pull carriages, and in fact, there are real zebras being ridden in the movie "Racing Stripes."
I suspect the difference between the ability to train horses and to train zebras can be at least in part explained away by the fact that horses were first trained several thousand years ago. Over time, humans bred horses for docility, most likely by eating the animals which proved harder to train. We did the same thing with cattle. Humans in sub-Saharan Africa never seemed to domesticate the animals at their disposal, however, (with the possible exception of guinnea fowl) and so, the zebra was left in its wild state.
I would imagine, but do not know, that if the horse had never been domesticated, wild horses would be almost as hard to train as would a zebra. Certainly, dogs, which have been domesticated from wolves for over 10,000 years are, in personality, wolves always stuck in their juvenile phase. I imagine lots of wolf cubs were eaten on the way to develop the modern domestic canid. Dogs (or wolves) which were more dog like were kept for breeding future generations, and over time, their personalities changed to the dogs we have now.
And, even the horses now considered "wild" are really feral domestic horses, except for a few isolated groups mainly in Asia, which I understand are about as resistant to training as zebras.
I recall reading about an American Bison who became inordinately fond of his owners as he was being raised, to the point of allowing himself to be ridden when grown. He was actually featured being ridden on television commercials. In the history of domestication, an animal like him would have been bred many times to secure the "amenable" traits he displayed.
I also read a reference to the now ex-Soviets training moose to saddle and yoke, saying they were more stable around aircraft than horses. And we all know that Santa has trained reindeer to pull his sleigh, although how he's bred them to fly is beyond me.
"will be ridden" is passive.
The past participle of ride is ridden."She was quite scarred as she hadn't ridden a horse before."
"Had ridden" is the past perfect tense.
Of course they do! How would the zebra species still be 'alive' if the adult zebras didn't have baby zebras. Of course they have babies.
Zebras reproduce sexually, so zebras do have fathers.
Zebras are prey. Several other animals eat zebras, but zebras don't eat other animals.
I had ridden my bike.
Ridden with Disease was created in 2000.
I haven't ridden...
No, there are no zebras in Wyoming. (Zebras are native to the African continent.)
Zebras.
No, Zebras are not carnivores.