Have to VS. Can
Complete with can for possibility. ________________ (I / not / meet) you at the park this afternoon.
I can’t meet you at the park this afternoon.
Complete with can for possibility. Martha isn’t free tonight. ____________ (she / not / go) dancing.
She can't go dancing.
Complete with can for possibility. ________________ (we / go) out for dinner on Saturday?
Can we go out for dinner on Saturday?