@Ichthus91,
a priori intuitions - the form into which all other intuitions go. These a priori intuitions are space and time. Intuitions are in immediate relation to the objects themselves and are needed in order to even view the object. In essence, we see things in space and time, but nothing else. The interesting thing to point out is that since we view things in space and time, we view them only as appearances and not in themselves.
Kant also talks about the impossiblity of viewing objects in themselves if space and time were considered objective of things in themselves. (Critique A 47)
Space deals with outer sense.
Time deals with inner sense.
Kant is hard and also very long winded at times in his Critique. If you can deal with his long windedness and his diversion on arguments that would be used against him, you can definetly read this book. However, its probably best that anyone who reads the Critique read it more than once (Im on my second run through this bad boy).
oh and synthetic means combining a predicate that was originally not seen in the subject. a priori means prior to experience. So synthetic a priori means "combining a new predicate not seen in the object prior to experience."
Hope this helps.