Floss'dan koşma hoşlanıyor
Floss likes to run

Bu akşam annemki bahçede köpek Floss koşıyordu ve oynıyordu. Köpek Floss kız çok iyi. Floss'yı ve başka iki köpeğimi çok seviyorum.
This evening Floss dog has been running and playing in my mother's garden. Floss dog is a very good girl. I love Floss and and my other two dogs very much.

Corrections please
(with explanations if possible)

there is a misstype bod

its "-mak"

koş-mak-tan

...koşmadan hoşlanıyor...
seems ok but it may mean also: "he likes without running"
(due to your expression on practical usage)

Scalpel is correct on saying that both the full and short infinitives are nouns. Yes and infinitive is the noun form of a verb. Like all nouns they take case suffixes.

An infinitive in nominative case is always the full infinitive.
An infinitive in dative case is always the short infinitive.
An infinitive in accusative case is always the short infinitive.
An infinitive in nominative case is 'always' the short infinitive.
An infinitive in locative case is always the full infinitive. *
An infinitive in ablative case is 'always' the full infinitive. **

* The short infinitive is sometimes used here but I don't suggest this.
** In some historical phrases which are very limited in number, the short infinitive still exist with the ablative: "yemeden içmeden kesildi".


Summary:
(no suffix) nominative : -mek > gitmek
(-e,-a case) dative : -me > gitmeye
(-ı,-i,-u,-ü case) accusative : -me > gitmeyi
(-ın,-in,-un,-ün) genitive : -me > gitmenin
(-de,-da case) locative : -mek > gitmekte
(-den,-dan case) ablative case : -mek > gitmekten

Pick any transitive verb and add an infinitive as object.
Example:

sevmek is a transitive verb. It takes -i case. So we say "öğrenmeyi seviyorum", "okumayı seviyorum".

Hoşlanmak is a transitive verb. It takes -den case. So we say "öğrenmekten hoşlanıyorum", "okumaktan hoşlanıyorum".

istemek is a transitive verb. It takes both the accusative case or nominative case. So we say "öğrenmek istiyorum", "okumak istiyorum".

"An infinitive in nominative case is always the full infinitive."
This is correct in any case including noun sentences.

"Türkçe öğrenmek çok kolay."
"Yüzmek çok güzel."

The short infinitive doesn't exist in nominative case except,
1. building permanent nouns: düşÃ¼nme, yüzme, okuma
2. creating noun modifications: yürüme hızı, dönme süresi, gitme zamanı.

Bod,
It is not only istemek but there are other verbs that take an infinitive as an object in nominative case.

Gerekmek is a second one:
"Çok konuşmak gerekmez."
"Çok su içmek gerekiyor."
Olmak is a third one:
"Gitmek olmaz."
"İlk yapacağım şey uyumak olacak."

So I found three verbs (istemek, gerekmek, olmak) so far in this category. Sorry, I don't know any source that includes this kind information. Some information I give in forums I derive on my own.

Scalpel,
I too wrote many times that infinitives are nouns.

Greetings bod,

It is very easy actually. Everything has a name. For instance you have a name, I have a name or that table has a name. All names by definiton are nouns.

For instance when I say "Bod", is Bod a person or a name? It is both isn't it? Smillarly when I say "table", is table an object with four legs or is it the name of an object?

While these words are names (and therefore nouns) they are also referring to objects, aren't they? When I say "Bod is very clever." I'm refering to you and not to the word "Bod".

We need names to talk about things. There are names for people, for objects, for actions, for anything that is imaginable.

When we talk about actions we also need the name of an action. Therefore there are names of actions.

"The name of an action is called an infinitive."

Because these are names of verbs (actions or occurings) they are at the same time nouns since all names are nouns.

When I say "koşmak" (to run) is this a noun or is this a verb? The answer is, "it is both". It is like asking "when I say Erdinç, is this a person or a name?" It is the name of a person (me, in this case).

Smillarly, koşmak is the name of the verb koşmak."An infinitive is the noun version of a verb."

When you talk about a verb you use the infinitive. You make the infinitive the object of the sentence, or in noun sentence it can be the subject of the sentence.

For instance "(Ben) koşmak istiyorum" has the infinitive koşmak as an object.
"Koşmak çok güzel." has the infinitive koşmak as subject. (There is no object in noun sentences.)

Instead talking about verbs when you conjugate them they are no more nouns. For instance if you conjugate the infinitive koşmak it is no more a noun.

"Ben koşuyorum."
"Koşuyorum" is a conjugation of the infinitive "koşmak" and koşuyorum is a verb. "Koşuyorum" can not be a noun since it doesn't name anything.

In short saying that "koşmak is a verb" or "koşmak is a noun" or "koşmak is both an noun and a verb" or "koşmak is an infinitive" are all correct.

Here is a short further reading:
http://www.answers.com/infinitive