... Until 1997, the Sears Tower (be) this place Checagou (wild onion) because it (smell) English pool of exercise Exercise on Simple Present Form positive sentences in Simple Present Anna / the window ... Signal Words of Present Perfect already, ever, just, never, not yet, so far, till now, up to now Exercise on Present Perfect Simple Put the verbs into the correct form (present perfect simple) ... yet Write questions in present perfect simple you / correct / my mistakes - you / practise / your English - she / tidy up / her room - the boss / sign / the letter - Mary / shut / the door Ask for...