4. When my friend has his English, he HAS TO stay at the office after work. He NEEDN'T TO stay at the office on Tuesday, Thursday and Saturday and CAN get home early. 5. DO you HAVE TO work hard to do well in your English? 6. "SHALL we BE ABLE TO discuss this question now?” “No, we SHAN'T. We SHALL do it tomorrow afternoon.” 7. I’m glad you HAVE come. 8. “WILL you BE ABLE TO come and have dinner with us tomorrow?” “I’d love to.” 9. “Please send them this article.” “Oh, SHALL I do it now?”