Exercise on Present Perfect Simple Form negative sentences in Present Perfect Simple. they / us / call→ she / on a chair / sit→ Ruth / the pencil / drop→ the train / the station / leave→ he / a coin / insert→ they / a new gadget / invent→ they / to my question / react→ Robby Robber / a bank / rob→ the farmer / out the seeds / sow→ the parents / their child / spoil→ Back to pool of exercises. ►