原因状语从句:常由because, as, since和for引导。例如:Nonetheless, I am still in favor of space travel, for it has brought us many benefits. 时间状语从句:常由when和while引导。...
时间状语常用since加一个过去的时间点,或for加一段时间,或by加一个现在时间。 例:Great as Newton was, many of his ideas have been challenged today and are being modified by the ...
The boy’s father told the boy that water freezes when the temperature drops below zero. 2. 从句中有具体时间状语,即使从句动作发生在主句动作前,仍然用一般过去时。 The teacher told us that she was born in 1982. 学完知识点,不妨来动手试一试! 01 I hope _...
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