can someone explain the difference between coilcovers, springs, and shocks?

with coilovers, you're able to adjust your ride height

Shocks are a damping device that absord energy created by springs. They stop the car from bouncing, keep the tires on the road. Your car uses struts, they are a type of shock absorber with springs mounted to them and structural unlike a shock.
http://www.modacar.com/Merchant2/struts_honda_files/koni_yellow_struts.jpg

Springs are the coil looking thing. They support the car allowing the suspension to move, taking in a lot of energy from turning, braking, etc.
http://www.modacar.com/Merchant2/springs/hr_race_springs.jpg

Coilovers are springs and struts designed to work with each other. They usually have adjustable damping and always have adjustable ride height.
http://www.modacar.com/Merchant2/coilover_honda_files/hks_coil.jpg

so coilcovers are just a combination of shocks and springs? also will all shocks and springs work together?

so coilcovers are just a combination of shocks and springs?

yes thats basically a coilover

There are coilover sleeves too, they look like a normal spring but have an adjustment collar on the bottom.

also will all shocks and springs work together?

Yes, that's only way it will work. Springs are compressed and mounted to struts(shocks)

Even without struts, there still has to be some kind of "shock" on a spring type suspension.