fly
In German, the verb 'fliegen' is used to describe the action of flying, whether it's a bird, an airplane, or a person with a jetpack. It can also be used metaphorically, for example, 'Zeit vergeht wie im Flug' (time flies). The verb conjugates regularly in the present tense: ich fliege, du fliegst, er/sie/es fliegt, wir fliegen, ihr fliegt, sie fliegen.
I want to fly to Berlin tomorrow.
This sentence illustrates the desire of the individual to travel to Berlin by air the next day. The verb 'fliegen', which means 'to fly', is used in the context of air travel.
Can you fly?
The usage of 'fliegen' in this sentence is a question directed at the ability of the person addressed to fly. This could either be literal or a metaphorical assertion that involves 'flying' in some way.
The birds are flying south for the winter.
In this example, 'fliegen' is used to describe the movement of birds. Here, 'fliegen' is used to denote the act of birds migrating to a warmer region during the winter.