because, before, after, when, while, untiled, During, though, although, recently, more...

before, until, up, to, prior, to, earlier, than

temporal, causal, concessive, conditional, comparative, sequential, hypothetical, more...

this is because,   because of that,   given that,   as i,   seeing as,   starting from,   from that time,   all this time,   is because,   only because