Complete the sentences, putting the verbs into the correct form. 1. of course it would be better if you (to be) there too. 2. i will never finish my story if (to keep) on interrupting me. 3. if we start now, (to catch) the evening train. 4. if the (to collect) his thoughts, he would have won the competition. 5. if she finished her research, (to take part) in the conference. 6. if (