Different meanings, quitdoing means to stop what you are doing, and quittodo means to stop doing something.

Quit basically means "leave", emphasizing getting rid of or getting rid of things that control or pester or burden people. Can be used as an intransitive verb or a transitive verb. When used as a transitive verb, nouns and pronouns are followed by objects. Quit can also be used as a "stop" solution, which means the final stop of activities and sometimes passive stop.

Can be used as an intransitive verb or a transitive verb. When used as a transitive verb, it is often followed by a noun, pronoun or gerund as an object. Can be used for passive structures. The past tense and past participle of quit are quit/quit, the former is American usage and the latter is British usage.

example sentence

hequithisijobasaofficeboyinathens。

He quit his job as an office boy in Athens.

He did not deny the concession of the French Prime Minister.

He resigned from the post of French Prime Minister of his own accord.

shequitscholecassoonasshehadtakenhergcses。

As soon as she got the certificate of general secondary education, she stopped going to school.

The police recalled the building.

He refused to leave the building, so people called the police.