be helpful to sth or helpful for sth?

[registered]

in the following sentence, which preposition should be used here, "to" or "for"?
Listening to English music did be helpful to (OR FOR) my listening. THANKS！

 

[emsr2d2]

in the following sentence, which preposition should be used here, "to" or "for"?
Listening to English music did be helpful to (OR FOR) my listening. THANKS！

First "did be" does not exist in English. You need "was".

Listening to English music was helpful for my listening comprehension.
Listening to English music helped my listening comprehension.