each vs every, by vs before

[AlexAD]

Hi,

'Each card can pay up to 7 full-fare rides at once, and must be used by the expiration date shown'.

Is the by same as before in this context?
I am not sure if I am right, but it seems that in spoken AmE they use each for every which is not grammatically correct.

Thanks!

Alex.

 

[onlineeslclasses]

Yes, you could use both "by" or "before" in this sentence. I'm not sure I understand the second part of the question though... Can you give an example?

 

[probus]

I must disagree with onlineenglishclasses. There is a difference between by and before. Americans must file their US income tax returns by April 15 each year, i.e. before April 16.