一、On no account can we + V ~~~ （我们绝对不能...）
例句：On no account can we ignore the value of knowledge. ?? 外语学习网
二、It is time + S + 过去式 （该是...的时候了）
例句：It is time the authorities concerned took proper steps to solve the traffic problems.
三、There is no one but ~~~ （没有人不...）
例句：There is no one but longs to go to college.
四、be + forced/compelled/obliged + to + V （不得不...）
例句：Since the examination is around the corner, I am compelled to give up doing sports.
五、It pays to + V ~~~ （...是值得的'。）
例句：It pays to help others. ??
六、SparenoefforttoV （不遗余力的）
例句：Weshouldsparenoefforttobeautifyourenvironment.
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