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英语的一些问题1.I (used to) be afraid of flying.My heart (would )st

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英语的一些问题
1.I (used to) be afraid of flying.My heart (would )start pounding every time I stepped on a plane.But now I'm used to flying and enjoy it.这一题中后者为什么用WOULD,明明这个动作现在已经克服了,WOULD不是反复性动作的意思的吗?为什么不能用USED TO?
2.The man is retired now.But when he was still working he (used to travel) up to town by train in the morning,and get back home in the evening in time for supper with his family.括号里能不能用WOULD TRAVEL?在他工作的时候反复的做这个动作,具有反复性.
3.If I won the ten million dollar lottery jackpot,I (could) afford to quit my job and travel the world.括号里用 would可不可以?为什么?
4.You (needn't have washed ) the dishes.I would've put them in the dishwasher.括号里能不能用didn‘t need to wash?为什么
5.Frog can search for food underwater,(hidden) from birds of prey.这里为什么用HIDDEN,它是什么词性?
6.I advised that the president should choose a few key issues to concentrate on .这句话里德ISSUES是什么意思?是questions,points 还是subjects的意思?
1.used to可指过去的状态或情况,意为“过去常常发生” I used to be afraid of flying.可以翻译成“我以前常常害怕坐飞机.”所以用used to
would表示反复发生的动作.如果某一动作没有反复性,就不能用 would
My heart would start pounding every time I stepped on a plane.这句话说的是:“以前每次坐上飞机时,我的心脏都会怦怦跳.(说明“我”以前坐飞机时,总会发生这样情况,所以是反复发生.用would).But I'm used to flying and enjoy it.(be used to sth./doing sth.意为“已经习惯...”)
2.此处可以想换.
3.afford to 表示“负担得起,买得起” could afford to 表“能够负担得起” 句子当中的意思是“如果我中了亿万头彩,我就能够辞掉工作而环游世界(因为“我”能够支付起旅游的费用)
4.I would've put then in the dishwasher."would have done"表示“本应该做,但没有做”.(“我”本应该把碗放进洗碗机去洗的,但是我没有这样做,因此“你”就洗了碗.)"needn't have done" 表示不必这样做,但是做了.因为后面的句子限定,只能用needn't have done.didn't need to wash 表“没必要去洗”(可能你还没洗碗).
5.birds of prey为固定词组“猛兽”
青蛙为肉食性动物,只要他吞的下都吃,普通蛙类吃昆虫蠕虫等,大型的牛蛙有人在他的肚子里发现过小鳄鱼和同类,可见蛙真的什么都吃.“蛙会在水下寻找食物,而它吃的这些动物大多都是已经躲避过猛兽的.”所以此处的逻辑主语是food,而这个food其实是指生物,hidden 是过去分词,非谓语动词的用法,是The food is hidden underwater.
6.issue为“重大的议题或问题” 一些提上政治层面的一般都是重大的问题.句中的president肯定是政治人物.question只是“小疑问,可以很快得到解答的”,比如数学题:questions about maths.point是观点,subject有“主题”之义.