There are dialectal reductions and even standard reductions. The German language uses them a lot.
We need the reductions to get our rhythm. (We will talk about that later.)
Here you see typical standard reductions:
Try to pronounce the sentence: Ich habe es Ihnen doch schon gegeben! (I've already given it to you.) like a normal German. Listen to the audio file. Were you right?
Here are more typical reductions:
Try to pronounce the question "Haben wir denn eigentlich noch ein Bier?" as if you were a German asking his/her room mate.
Compare it to the audio file. Were you right?
Now pay attention to the time difference when pronouncing in the "official" way, like a theatre actor, and in the normal way, also used by the professional speaker when he is at home or acting in a film.
The possibility to pronounce syllables in a very fast or in a very slow way is very important for the musicality of German language. You probably know that there is a lot of great classic music composed by German-speaking composers. (Bach, Beethoven, Mozart, Brahms, Liszt, Schubert, Schumann etc.) This music reflects the musicality of the German language.