How would you explain the meaning of this word if you it? (not know) We would be happier now if you the dinner when we called you. (not refuse) If I were you, I there tomorrow. (not go) If Ken the car, who will do it? (not mend) If I in a hurry when I got up, I wouldn't catch the train. (not be) She won't finish it on time if she right now (not start) Had I driven slowly, I in the hospital now. (not be) She would be a bit overweight if she to exercise a few months ago. (not begin) Had he not let me know, I him at the airport tomorrow morning. (not collect)

Certainly! Here’s how to convey the meanings by using the appropriate verbs in their negative forms: 1. **If you knew the meaning of this word**: This implies that if you had the knowledge of the word, you would be able to explain it. 2. **We would be happier now if you hadn’t refused the dinner when we called you**: This suggests that if you had accepted the dinner invitation, current happiness levels would be improved. 3. **If I were you, I wouldn’t go there tomorrow**: Here, it indicates that if you were in the other person's situation, you would choose not to go. 4. **If Ken doesn’t mend the car, who will do it?**: This question implies that there is an expectation for Ken to fix the car, and if he does not, it raises a concern about who else will take on the task. 5. **If I hadn’t been in a hurry when I got up, I wouldn’t have caught the train**: This indicates that being in a hurry was the reason for catching the train, and if that had not been the case, the outcome would have been different. 6. **She won't finish it on time if she doesn’t start right now**: This emphasizes the urgency of beginning the task in order to meet the deadline. 7. **Had I driven slowly, I wouldn’t be in the hospital now**: This expresses that a more careful driving pace would have resulted in avoiding the current situation of being in the hospital. 8. **She would be a bit overweight if she hadn’t begun to exercise a few months ago**: This implies that starting to exercise was a factor in maintaining her current weight. 9. **Had he not let me know, I wouldn’t have collected him at the airport tomorrow morning**: This suggests that the action of letting you know was crucial for you to plan to pick him up. Feel free to ask for more details or further assistance!