Exercise on Present Perfect Simple Form negative sentences in Present Perfect Simple. we / a mountain / climb→ we / the door / open→ the teacher / our English / test→ the boss / the contract / sign→ the train / the station / leave→ the cat / the mouse / chase→ we / a new territory / explore→ they / a hole / dig→ the farmer / out the seeds / sow→ I / my tea / spill→ Back to pool of exercises. ►