ought to, should

1. You ought to scrap the old bike and buy a new one.
   你應該扔掉這輛舊自行車，買一輛新的。
2. You ought to have a haircut.
   你該去剪發(fā)了。
3. She failed one of the exam papers, but we ought to make allowance for the fact that she was ill.
   她有一門不及格，但我們必須考慮到她當時有病。
4. Regularity ought to be observed, as regularity is very conducive to health.
   生活應遵守規(guī)律，因為規(guī)律對健康有益。
5. China ought to make a greater contribution to humanity.
   中國應當對于人類有較大的貢獻。
6. He is a very good tennis player; you ought to see him in action.
   他是個很好的網(wǎng)球運動員，你應當去看看他打球。
7. I think there's a train at 8.20 but you ought to make certain.
   我想8點20分有一班火車，不過你應該打聽清楚。
8. I think you ought to go to/to go and see (ie consult) the doctor.
   我認為你應當去找醫(yī)生看看病。