Exercise on Past Progressive Form negative sentences in Past Progressive. you / a box / carry→ you / to the radio / listen→ The children / about the joke / laugh→ she / her room / tidy→ she / my mistakes / correct→ we / in a forum / chat→ they / on the task / concentrate→ Jim / his head / cover→ cars / the environment / pollute→ they / the new student / welcome→ Back to pool of exercises. ►