*syntax* - basically the word(s) you type into your editor that tell your computer what to do. So if you get a syntax error from your compiler, it means that somewhere in your code you typed an incorrect command.
*string* - A string can basically be any combination of letters and numbers which is stored in a variable.
So if you wanted to store "Hi, my name is AluminumPork" into a variable, you would type this into your editor.
TEXT$ = "Hi, my name is AluminumPork"
and an example of something isn't a string could be
NOTASTRING = 4
*parameters* - Parameters are basically the information you give a command so it can do what you want it to.
So in the command
SET CURSOR 5,5
the 1st 5 is a parameter that's telling where on the X axis you want the cursor to go. And the 2nd 5 is telling where you want it to go on the Y axis.
I have no idea of your skill level, so if this is wayyy too simple for you then I appologize. If not, then I hope I helped.
Anyone else willing to comment on any mis-information I may have given?
P4 2.4Ghz HT, 512MB RAM, ATI Radeon 9600 128MB, 19" Viewsonic, 80GB HD