Without verbs, we couldn't really do anything. Yes, that's right, verbs are words that are actions, movements, etc. They're very important for sentences to make any sense ;)
Verbs in German change their endings to match their subject. This is called conjugation. Most verbs in German are conjugated according to predictable rules.
To conjugate verbs, just remove their -en ending and add the new, conjugated ending.
1. Ending for ich
2. Ending for du
3. Ending for er/sie/es
Er spricht fließend Spanisch und Englisch.
He speaks Spanish and English fluently.
Not too hard, right? It takes a little getting used to, but you'll get the hang of this is no time.
The German es is not necessarily translatable with the English "it". It is much more about the gender of the nouns.
Talking about "the table", German: der Tisch
Talking about "the sun", German: die Sonne
Talking about "the baby", German: das Baby
Some verbs are regular, others are irregular, but we will get to all of that later. For now, we'll stick with the easy ones :)