|+ / - / ?|
|was / were + Ving|
Affirmative sentences (+): was/were + Ving
|Subject||was / were||Ving|
Negative sentences (-): was / were + not + Ving
|Subject||was / were||not||Ving|
was not = wasn't
were not = weren't
Interrogative sentences (?): ... was / were + S + Ving … ?
|(QW)||was / were||Subject||Ving||"what / where / when"||?|
|Where||were||you||working||yesterday at 8 o'clock||?|
|Was||he||working||when the children came||?|
Yes, S + was / were.
No, S + wasn't / weren't.
|Yes,||Subject||was. / were.||No,||Subject||wasn't. / weren't.|
In short answers we use pronouns (I, we, you, they, he, she, it)
— Was Adam working yesterday at 9 o'clock?
— No, he wasn't.
(Not: No, Adam wasn't.)
Ving — Verb ending in "-ing" (Present Participle). E.g. writing, going, listening, etc.
Revise how to add "ing" to a verb here.
S — Subject of the sentence
QW — Question word