Deduction and obligation Question tags

[JMCGHK]

[FONT=&#23435]Dear all,[/FONT]

[FONT=&#23435]Which is correct in each sentence?[/FONT]


[FONT=&#23435]1. He must work late, mustn’t/must he? [/FONT]
[FONT=&#23435]2. He mustn’t work late, must/mustn’t he? [/FONT]
[FONT=&#23435]3. Red must be one of the most powerful colours, is/isn't it? [/FONT]
[FONT=&#23435]4. He must be a bus driver, is/isn’t/must/can’t he? [/FONT]
[FONT=&#23435]5. He must know, does/doesn’t/must/can’t he? [/FONT]
[FONT=&#23435]6. He might know, does/doesn’t/might/mightn’t he? [/FONT]

[FONT=&#23435]Thx[/FONT]

 

[heidita]

JMC, why not post your answers first, then we can discuss the mistakes.

cheers