No one is going to be able to answer this question without a lot more
information.

When you say it wont start, does that mean that the engine turns over
when the starter is engaged but never fires up?

Or does that mean that the starter does not turn the engine over at
all.

Barring catastrophic mechanical failure (which you surely would have
noticed, right, any loud crunching noises from under the hood?) there
are only two system failures that can keep the car from starting, fuel
and ignition.  That's where diagnosis starts.  You can have fuel
pressure checked. You can check for spark.

Apply basic scientific analysis to your problem and you are much more
likely to have good results than you are by asking a bunch of
strangers on a Usenet group.

Now, if you can come back with a list of things you tried,
systematically, and post the results, one of the knowledgeable persons
that read this group may be able to help you.

Elliot Richmond
Freelance Science Writer and Editor

I cant start my civic all of a sudden.  I had this problem before and
it started with difficulty, after some time, and now it wont start at
all.  Any suggestions?