摘要： 介词及介词短语but that, as though, once , but for, without , with , under , under-condition , supposing , suppose , as if , on condition that , in the past 等 But for his pension , he would starve .要不是有养老金.他都要饿死了 Without your help , I couldn’t have achieved all this . 要不是有你帮助我不会取得这些成就 With his aid , you would succeed . 如果有了他的帮助.你就会成功. Plants would die without water on the earth . 地球上如果没有水.植物就会死的 But for the fog we would have reached our destination long ago . 要是没有雾的话.我们很早就到目的地了 Under more favourable conditions we could have finished the task . 如果条件对我们更有利.我们就会把工作完成得更好

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