Yes. You
can use the same address multiple times and still receive funds to it.
However there are several problems with this, outlined in the
Bitcoin Wiki article on address reuse. You harm the privacy of others as well as just yourself.
If you do it, just make sure you understand the risks involved and the fact that address reuse is not an intended feature of BTC. The only time when you would have to reuse addresses is when you receive payments from the same group at regular intervals and you don't give them a new address each time.