The conversation between human and AI assistant.
When should I use aren't and wasn't?
Okay, and what about the negative contractions of 'is' and 'has'?
The negative contraction of 'is' is 'isn't', which is used in the present tense. The negative contraction of 'has' is 'hasn't', also used in the present tense. For example, "He isn't feeling well today" and "She hasn't finished her homework yet."