what is exact meaning

[venkadeshe]

I am a beginer,

I have one doubt, please help me.
What is the ifference between for and to in preposition
I agreed for help.

i agreed to help.

[Tukanja]

I'd rather say

I am agreed for help.

The Passive Voice is needed, is it?

[YourUSApal]

I want to differ slightly with Andrew: in the USA, at least, you would never hear someone say "I agreed for help" or "I am agreed for help." These are not accepted usages and sound very unnatural.
"I agreed to help" is correct, meaning you were willing to give help. The opposite situation requires more. If someone offered to help you and you accepted it, you might say, "I agreed to accept help" or "I agreed to accept his help" or even "I agreed to accept his offer of help". I hope this helps!