If you look into BONDING of network connections you find most folk are not ready to go down that path.
My answer must be no and hope I don't upset you too much as this is one of those very advanced areas where if you ask, you may not be doing this. But I can point you to what words to search with.
My neighbor and I were wondering if it is possible to combine our respective internet connections in order to gain a faster connection overall. What would be ideal would to have a wireless router in one of our houses, that is simultaneously connected to both of our ADSL routers, and to which both of us are able to connect. Is such a setup possible? Do I need a specific type of router? What routers would you recommend? (the strongest wifi signal possible would be useful)