An apostrophe usually means that the word is either a contraction or it indicates possession. It never indicates plurality.
Thereis no oxygen so no
no thereis not
yes thereis but on 2011 unfortunatly
thereis no infrastructure
thereis 7.00am
yes because even in that thereis sperm
yes thereis a team called Real Madrid.
Thereis no lowest negative integer.Its keeps going on
Thereis a website called epubbid
There isn't one but thereis a SVR06 that was made in 2005
thereis no cheat codes for tinkle i think
No, thereis no similarity apart from colour