Do you know when that book was published? I must buy some milk before mum gets here. (Don’t put ‘to’ after modal verbs – must, can, should, might etc) Let me give you some good advice; Never get married! ('advice' is an uncountable noun – 'some advice' / 'a piece of advice') I can't pass this stupid exam. I don’t have enough vocabulary. (word order – enough + noun)