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1 On no account can we + V 例句：On no account can we ignore the value of knowledge. 2 It is time + S + 过去式 例句：It is time the authorities concerned took proper steps to solve the traffic problems. 3 There is no one but 例句：There is no one but longs to go to college. 4 be + forced/compelled/obliged + to + V 例句：Since the examination is around the corner, I am compelled to give up doing sports. 5 It pays to + V 例句：It pays to help others. 6 Spare no effort to + V 例句：We should spare no effort to beautify our environment. 7 ~~~ the + ~ est + 名词 + + 主词 + have ever + seen ~~~ the most + 形容词 + 名词 + + 主词 + have ever + seen 例句：Helen is the most beautiful girl that I have ever seen. 8 Nothing is +er than to + V Nothing is + more + 形容词 + than to + V 例句：Nothing is more important than to receive education. 9 cannot emphasize the importance of too much. | 
