"Wasn't" is short for "was not," used to make past-tense negatives with singular subjects. It denies a past state or action and sounds informal in everyday speech. It contrasts with "was" and with "weren't."
Abiy said he wasn't aware of the criteria the Nobel Committee used to select recipients for the prize. Source: Internet
According to sources, the filmmaker isn't refraining himself from supporting his industry colleagues in fact he wasn't approached for any sign to file the lawsuit. Source: Internet
About two-thirds of the stadium wasn't filled, and photos from the rally showed rows upon rows of empty blue chairs. Source: Internet
According to Zeglin, if it wasn't for soil microbes, anything extra could leach out of the soil and pollute groundwater, streams, rivers and lakes. Source: Internet
A fan of The Bachelor perfectly explained on social media why Peter Weber's mother Barbra wasn't fair to Madison Prewett from the start. Source: Internet
Adam Clune's Dragons debut wasn't a happy one - but you won't catch him complaining. Source: Internet