Merhaba,
Sahıpsıd kötü düş bu gece. Is thıs sentence rıght?
Teşekkür ederim.

maybe it's: Bu gece sahi kötu düş göreceğim.

I think you are trying to say, Tonight,I'm going to have really bad dreams.(?) Hope this was helpful but I have no idea if it's right or that's what you wanted.

I wanted to say: " Last night I had bad dream."
But really thanks for you answer...

I think I have to study more...
Past tense is hard in turkish for me ...

Dün akşam kötü bir düs gördüm.

Dün akşam - Last night
düs görmek- (literally, see a dream, in English have a dream)

I feel confident on the translation but I might be wrong.

That sounds better, I don't why I put akşam, wasn't thinking. I don't think there is any difference between rüya and düs, not by looking at the dictionary anyway. Thanks for the correction.

Thank you very much Elisa and Kezzap...

Turkish wife says düş is the more poetic word for dream and rüya is the normal one.

The other suggestions are not bad either but I would prefer this one:

"Dün gece kötü bir rüya gördüm."

Instead "dün gece" if you say "geçen gece" it will be the night before last night. Smillarly "geçen gün" is the day before yesterday.

Yes düş is more poetic. Also düş implies more like an imagination.

In English there is no difference between a dream while you sleep and a dream that you have while you are conscious.

When Martin Luther King said "I have a dream" he didn't mean a dream he had while sleeping. In Turkish we devide them.
'rüya' is strictly for a dream that you have while sleeping.
'düş' is mostly for an imagination when we don't sleep. It can be intuitonal or fictional but in any case we are conscious. The images are in front of our eyes. We have seen them in some ways. Maybe something has inspired us to see the image.

"Dün gece kötü bir düş gördüm." is more likely to be a dream/imagination that you have while not sleeping. If you had given me this sentence and would ask me whether or not the person is likely to sleep during this action I would say 80% not sleeping and 20% sleeping.

Hayal is different than both rüya and düş. Hayal strictly has nothing to do with sleeping. Hayal includes hope for something to become true. "Hayal etmek" and "hayal kurmak" are both common verbs. Also "hayal kırıklığı" means disapointment and "hayalperest" means "dreamer" (the kind of person who is in a dream world).
I would translate Martin Luther King's speech with hayal: "Bir hayalim var"