I have never used or heard of tatoeba, but I use tangorin for my example questions. Tangorin looks like it uses the same thing as tatoeba, if you look at the bottom and it has a link to tatoeba.
check it out, it may be what you are after: http://tangorin.com/examples/
check it out, it may be what you are after: http://tangorin.com/examples/