Subassembly and assembly

Hi,

Is there a way in SW to put a part or subassembly from main assembly (when that assembly is open) in a subassembly that is in same main assembly and to keep the referent space betwen those components.

hope i hew a good explonation,here 1 more

I got a main assembly "A" and 3 subassembly "A1" "A2" "A3" that are in main assembly. I want to hew main assembly "A" with his subassemblies "A1" "A2" and "A3" inserted intho 1 of those 2 another subassemblies.

nice day

SolidworksAssemblies