watertommyz9255-san,
kon'nichiwa!
I think I know what exactly you mean.
I often have the same problem with languages I'm studying.
It is totally okay to speak slowly at the beginning, even breaking the sentence down to
word basis. I'm not too sure which level you're in, but assuming you're really at the beginning of
learning Japanese, I've got a recommendation. Let's take the simple short sentence as an example:
watashi wa nihon-jin desu. (= I'm Japanese).
You can pronunciate each words, right? To say this sentence fluently, first try:
"des" (unstead of pronouncing "su" properly, drop "u") three times.
Then,
"jin des" three times.
Then,
"nihon-jin des" three times.
Now,
"watashi wa" (pause) "nihon-jin des" three times.
If you got used to repeat this, finally, without any pause but slowly,
"watashi wa nihon-jin des".
After that, just try a bit faster until it sounds like a natural speed.
The point here is to practice repeating the part of the sentences, making it longer and longer.
Try not to separate particles, though. This means, "watashi wa" needs to be practiced together
never "wa nihon-jin des".
If you have other sentences you want to practice this way, please give us that sentence(s)
and I'll give you the tips how to break it down in the best way
Natsuko (奈津子),
Team JapanesePod101.com