Tham khảo tài liệu 'grammar in use new part 21', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Unit 65 Adjective to . Difficult to understand etc. Compare sentences a and b Jim doesn t speak very clearly. al It is difficult to understand him b He is difficult to understand. Sentences a and b have the same meaning. Note that we say He is difficult to understand not He is difficult to understand him. You can use the same structures with easy hard impossible dangerous safe expensive cheap nice good interesting exciting Do you think it is safe for us to drink this water Do you think this water is safe for us to drink not to drink it The questions in the exam were very difficult. It was impossible to answer them. The questions in the exam were very difficult. They were impossible to answer. not to answer them Jill has lots of interesting ideas. It s interesting to talk to her. Jill is interesting to talk to. not to talk to her. You can also use this structure with adjective noun This is a difficult question for me to answer not to answer it It s nice of you to . You can say It s nice of somebody to do something It was nice of you to take me to the airport. Thank you very much. You can use many other adjectives in this way. For example kind clever sensible mean silly stupid careless unfair considerate It s silly of Mary to give up her job when she needs the money. I think it was very unfair of him to criticise me. I m sorry to . 1 was surprised to . etc. You can use adjective to . to say how somebody reacts to something I was sorry to hear that your father is ill. You can use many other adjectives in this way. For example happy glad pleased sad disappointed surprised amazed astonished relieved Was Julia surprised to see you It was a long and tiring journey. We were glad to get home. The first the next etc. to . You can use to . after the first the last the next the only the second etc. If I have any more news you will be the first person to know. The next train to arrive at platform 4 will be the to Cardiff. Everybody was late except me. I was the only one .