Complete these conditional sentences with the verbs in the correct tense.
1) She can help you if you (ask) her.
2) If she (have) a free evening tomorrow, she will take both of you to the
cinema.
3) If we have enough water, we (not be) thirsty.
4) More species (to survive) if we (to protect) nature.
5) clean water (not be) a problem if people (to stop) throwing rubbish into the
seas and rivers.