-You ever (have been) to Australia? -Yes. Several times. -When were you (last) there? -I (was) there in 2011. -What places did you (visit)? -You (have you bought) the dictionaries yet? -Yes. -When did you (buy) them? -Yesterday -In the book shop near my house. -Where is John now? -He (went) to the bank. -Why did he (go) there? -He (went) there to take some money out of it. In dialogue 1, the tense used is the past simple. In dialogue 2 and 3, the tense used is the present perfect.