By +Ving，~~ can ~~(借着……，……能够…… 例句：By taking exercise，we can always stay healthy. 借着做运动，我们能够始终保持健康。 ~~~ enable + Object(受词)+ to + V(……使……能够……) 例句：Listening to music enable us to feel relaxed. 听音乐使我们能够感觉轻松。 On no account can we + V ~~~(我们绝对不能……) 例句：On no account can we ignore the value of knowledge. 我们绝对不能忽略知识的价值。 人教高中英语单词mp3 人教版初中英语单词表 人教版高中英语音频 need后接动名词时，表达“被动含义”，need doing= need to be done 需要被 The question needs discussing. = The question needs to be discussed. 问题需要被讨论。 How often does your hair need washing?  = How often does your hair need to be washed?  你的头发需要多久洗一次？ didn't need to do sth意为“过去没必要做某事，事实上也并没有这样做” I didn't need to cut the grass myself．My brother did it．  我用不着自己修剪草坪。我的兄弟修剪过了。（没有必要，而且无行动） You didn't need to tell him the news; it would just make him sad. 你无需告诉他这一消息，那只会使他悲哀。（没有必要，而且无行动） 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. 该是有关当局采取适当的措施来解决交通问题的时候了。 So +形容词+ be +主词+ that +句子(如此……以致于……) 例句：So precious is time that we can‘t afford to waste it. 时间是如此珍贵，我们经不起浪费它。 dare（dared）的用法  注意：dared 是dare的过去式 作情态动词用 意为“敢，竟敢”, 主要用于疑问句、否定句和条件句中，后接动词原形； 没有人称和数的变化； 否定形式：dare not/daren’t； 疑问句中直接把dare提前。 How dare she do things like that to me?  她怎么敢对我做那种事?  —Dare you catch the mouse? 你敢去抓那只老鼠吗？  —I daren't do that. 我不敢抓。  If you dare say that to our teacher, I would vote for you.  如果你敢向我们的老师说那件事，我就投你一票。 Why didn't you tell me about your trouble last week? If you ________ me, I could have helped. A. told B. had told C. were to tell D. would tell I was wearing a seatbelt. If I hadn't been wearing one, I ________. A. were injured B. would be injured C. had been injured D. would have been injured