what is ''Sing'' in the past tense?

[sg-ahri-3]

Sang or sung for past participle

Guessing it is singed cause something went up in flames,and not the building. JOKES

Might aswell name the thread "What do uneducated people think the past tense of sing is"

Here's a joke for you Mao'kai = I Am Oak rearrange the letters Oh and you also could have said Signed

This is so stupid that it's actually funny.