If i ________(not drink) so much coffee yesterday afternoon, i would have been able to sleep well last night. 2. If the medicine _______( take) in time, it will be quite effective. 3. I saw the man ________( knock) down by a car in the street. 4. They stopped ______(search) for the missing plane as the weather was very rough. 5. In two months' time he _____(finish) his training and start work. 6. He talked as if he _____(do ) all the work himself, but in fact Tom and I did most of it. 7. I didn't see your boss at the meeting. If he ____(come) , i would have told him this news. 8. It is advisable that we _____(sign) an agreement right after the discussion. 9. As soon as I ______(get) home, it started to rain heavily. 10. I'm afraid you have been speaking too fast to make yourself ______(understand).