japanese verb combinations?

I was experimenting a little bit with the japanese verb types an i was wondering if the following combinations are actually used. If they are, can the -te, -ta, -tai etc. form of those be built?
passiveconditional: if it would be ... (e.g. eaten)
causativ conditional: if someone would let somebody do something
causativ passiveconditional: if somebody made somebody do sth.
potencial causativ: if somebody could do it
potencial causativ konditional: if something can be done
potencial causativ passive somebody can be made to do sth.

dairwolf said:

I was experimenting a little bit with the japanese verb types an i was wondering if the following combinations are actually used. If they are, can the -te, -ta, -tai etc. form of those be built?
passiveconditional: if it would be ... (e.g. eaten)
causativ conditional: if someone would let somebody do something
causativ passiveconditional: if somebody made somebody do sth.
potencial causativ: if somebody could do it
potencial causativ konditional: if something can be done
potencial causativ passive somebody can be made to do sth.

Click to expand...

I believe that all the phrases you've listed can be expressed.
I'll write down using the verb "to eat/taberu" for example.

passive conditional: if it would be ... (e.g. eaten)
If (it is) eaten: moshi taberare tara

causativ conditional: if someone would let somebody do something
If someone let somebody (xx) eat something (yy) : moshi xx ni yy wo tabesase tara

causativ passiveconditional: if somebody made somebody do sth.
If someone is made to eat something (yy) : moshi yy wo tabesaserare tara

potencial causativ: if somebody could do it
If somebody (xx) can eat it (yy) : moshi xx ga yy wo taberare tara

potencial causativ konditional: if something can be done
If something(yy) can be eaten: moshi yy ga taberare tara

potencial causativ passive somebody can be made to do sth.
If somebody (xx) can be made to eat something (yy): moshi xx ga yy wo tabesaerare tara

Note: conjugation of passive and potential can be the same (depending on the verb) thus can be very confusing.
tabe-ru : to eat
tabe-rareru : to be able to eat
tabe-rareru : to be eaten
tabe-seaseru: make (someone) to eat

thank you very much for your reply! yes, potencial and passive indeed can be confusing. thanks again!