Вставьте слова где какие нужно

1. buses must come on time. buses will have to come on time. buses had to come on time 2. you must pay for things that you buy. you will have pay for things that you buy. you had to pay for things that you buy. 3. may i smoke here? will be i allowed to smoke here? might i smoke here? 4. he can drive a car well. he could drive a car well. he will be able to drive a car well. 5. you must finish this work by six o'clock. you will have to finish this work by six o'clock. you had to finish this work by six o'clock. 6. they can speak french. they could speak french. they will be able to speak french. 7. he can stay here for a while. he could stay here for a while. he will be able to stay here for a while. 8. you can take my book. you could take my book. you will be able to take my book. 9. can you go to the office on saturday? could you go to the office on saturday? will you be able to go to the office on saturday? 10. we must be at the office on time. we will have to be at the office on time. we had to be at the office on time.