- Complete the first conditional sentences with the correct form of the verbs.  1) If we (leave) now, we (be) at the airport on time.2) If I don’t have a big suitcase, I (not pack) everything.3) I think the plane ticket (be) cheaper if you (buy) it now.4) I won’t take my phone charger if you (take) yours.5) If he (not turn down) the music, the neighbours (be) angry.6) They (not go) on holiday if they (not have passports.