Can Can't

(a)   the piano ... (she / play / -)

... but (a)   the guitar. (she / play / +)

(a)   a horse? (they/ ride/ ?)

(a)   very fast. (a horse / run/ +)

(a)   the boxes? (John / take out/ ?)

(a)   English. (I / speak / +)

(a)   can and can't. (we / use/ +)

(a)   the foals. (You/ feed / -)

(a)   ? (he / cook/ ?)

(a)   what you are saying. (we / hear / -)