【正文】
m at once. ,憂慮,惋惜等感情色彩. I am surprised he should eat so little every day. Have to/must ? have to 表示客觀需求 ? must 表示主觀愿望 ? Everyone has to go to school at the age of 7 in the country. ? We must wok hard to make our country strong and rich. ? You must work hard to win the gold medal. Certainty might/may/could/should/ought to/will /must She might win a medal at the Olympics. She may be at home now. She could read and write at the age of 4. She should e to join us. She ought to/will /must help me whenever I am in trouble. Permission can /could/may/might ? A: Can I watch the Olympics ? ? B: Yes, you can.? No, you can’t. ? A: May I have a look at you photo? ? B: Yes, you may./ No, you mustn’t. ? No, you’d