The past tense of op is opped. See all forms of op with easy examples.
The past tense of ooh is oohed. See all forms of ooh with easy examples.
The past tense of oooh is ooohed. See all forms of oooh with easy examples.
The past tense of oop is ooped. See all forms of oop with easy examples.
The past tense of ontake is ontook. See all forms of ontake with easy examples.
The past tense of oompah is oompahed. See all forms of oompah with easy examples.
The past tense of onsend is onsent. See all forms of onsend with easy examples.
The past tense of onpass is onpassed. See all forms of onpass with easy examples.
The past tense of onsell is onsold. See all forms of onsell with easy examples.
The past tense of onset is onset. See all forms of onset with easy examples.