YOU SAID:
mark David can be annoying sometimes
INTO JAPANESE
マークデイビッドは時々迷惑になります
BACK INTO ENGLISH
Mark David is sometimes annoying
INTO JAPANESE
マークデイビッドは時々迷惑です
BACK INTO ENGLISH
Mark David is occasionally annoying
INTO JAPANESE
マークデイビッドは時々迷惑です
it is unlikely that this phrase will ever reach equilibrium