Spanish Help???

Ok I need help with this activity. This activity is just asking you to use two sentences as examples for yourself for the sentences you will create. For example you may choose "Es un tibur�n." = It's a shark, and "Jugar con un tibur�n es peligroso." = It's dangerous to play with a shark. You can see from these two sentences that you conjugate a verb (or change the ending) when the verb is referring to a subject in the sentece (es= the verb ser conjugated and referring to the shark), and you leave the verb in the infinitive form (do not change the ending) when the verb is read like to do something in English (jugar = to play). I need to create ten sentences...5 in the infinitive form and 5 in conjugated...please help!!!