hear vs listen
when and How I must use both words

sometimes I don´t know when I need to use wheter hear or listen

Please give me examples.

thanks in advances

Question

hear vs listen
when and How I must use both words

sometimes I don´t know when I need to use wheter hear or listen

Please give me examples.

thanks in advances

Answer

Hearing is when the sound is picked up by your ears.  
"I heard a loud noise!  It scared me."  (You were not listening for the loud noise, but you heard it)

Listening is when you are trying to look for a sound.
"I was listening to the radio, but I could not hear it because it was too quiet."

Answer

Listen is an active process that involves some understanding -
I am listening to the radio 
Where as hear, is just the physical process of perceiving sound
I hear the radio - I may or may not be listening, I just hear the sound of the radio

Answer

Thank you. Peachey

Answer

Grammatically, "hear" is a transitive verb and needs an object. What did you hear?  No preposition needed.  However, "Listen" is intransitive.  If you add an object, you need a preposition. What did you listen to? Notice how this works in Brian and Cyris' answers.