is it possible to have length, width and time. A 2D or 1D object with the 4th dimension (although then there would not be 4 dimensions so would it b 3D?) .
Sure, a 2D object that exists at more than one point in time would have those three dimensions. It'd be called 2+1-dimensional and there are various physical theories that could be adapted to describe it.
In our own universe, of course, all actual objects are 3+1-dimensional, because as far as we know, the universe itself is 3+1-dimensional (3 dimensions of space and one of time).
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There is a nice animation about the 10th dimensions which goes through the various dimensions. Check it out: http://www.youtube.com/watch?v=JkxieS-6WuA