Do all comets have the same orbit around the sun
and i need to no why its for my science homework
No, they don't. But you can easily look this up yourself, and increase your knowledge, not to mention get a clearer explanation.
all bodies, including comets, orbit the Sun ANTI-clockwise.
*knowSome are regular (Halley's Comet) and others are very irregular (as demonstrated by the recent ISON comet).http://epoxi.umd.edu/3gallery/comet_orbits.shtml
Oops I didn't mean to answer this.