Tham khảo tài liệu 'longman grammar of spoken and written english part 54', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Infinitive clauses 721 A Necessity and importance Necessity or importance adjectives regularly control extraposed rather than postpredicate to-clauses I m sure it s not necessary to ask you not to pass any information on to the Communists news If the development of the unit spans a long period it will be essential to make use of the new developments of this kind acad If you want peace it is important to stay cool news As always it was vital to preserve the atmosphere of the commonplace. fict B Ease and difficulty Adjectives marking ease or difficulty can control extraposed to-clauses as well as to-clauses in post-predicate position Pattern 3 . Difficult and hard are common in both It s very very difficult to separate these topics out and teach that one as a topic. CONV Moreover it is notoriously difficult to predict the costs of major infrastructural projects. NEWsf It s hard to know where she learns her lines fict It can be tough to attract people news It is easy to see that the model ignores some fundamentally important variables. ACAD I It is possible to love and to aid thy neighbor without state intervention. news c Evaluation Evaluation adjectives with extraposed to-clauses come from two major subclasses adjectives marking general goodness or badness and adjectives marking some more specific evaluation or assessment. Adjectives marking goodness or badness indicate a generalized positive or negative stance towards the proposition in the extraposed to-clause. These adjectives include bad best better good nice wonderful worse It s good to see them in the bath conv t It d be better for him to put that fire on at night time conv It was bad to be prodigal. fict Other evaluation adjectives represent more specific assessment or evaluation of the proposition in the to-clause It was awkward to move elbows and clap in such a crowd of people fict For the purposes of thứ paper it is convenient to consider four major categories of uncertainty. acad It is reasonable in this
