Question forms of influence & affect
How has it influenced you?
Did it influence you?
Did it affect you?

Are these questions grammatically correct?

Question

Question forms of influence & affect
How has it influenced you?
Did it influence you?
Did it affect you?

Are these questions grammatically correct?

Answer

I think they are all perfectly correct.

Answer

I agree with Dan Smith.

Answer

According to me it's not correct to say "How has it influenced you? " or " Did it influence you? " because influence is used to have an effect on the way that somebody behaves or thinks,  especially by giving them an example to follow. 
So "affect" will be more appropriate rather than influence

Answer

According to me it's not correct to say "How has it influenced you? " or " Did it influence you? " because influence is used to have an effect on the way that somebody behaves or thinks,  especially by giving them an example to follow. 
So "affect" will be more appropriate rather than influence