Complete the sentences.use the correct form of the verbs. 1. if i"d known (know) it was birthday. i would have bought (buy) you a present. 2.if you (study) harder,you (pass)your exams. 3.we (not win) the game if we (not play ) well. 4.azat ( buy ) the new trainers if he (have) enough money. 5.sarah (go) to the cinema with paul on friday if he (ask) her.