标题: 时态到底有没有固定用法？大家是不是排除时候最后看时态？ [打印本页] 作者: emily727 时间: 2011-3-11 19:17 标题: 时态到底有没有固定用法？大家是不是排除时候最后看时态？ 比如OG12 41. To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility. (A) have to know a great deal more than now about the social and economic (B) have to know a great deal more than they do now about the social and economical (C) would have to know a great deal more than they do now about the social and economical (D) would have to know a great deal more than they do now about the social and economic (E) would have to know a great deal more than now about the social and economic to......would do... 50. According to some analysts, the gains in the stock market reflect growing confidence that the economy will avoid the recession that many had feared earlier in the year and instead come in for a “soft landing,” followed by a gradual increase in business activity. (A) that the economy will avoid the recession that many had feared earlier in the year and instead come (B) in the economy to avoid the recession, what many feared earlier in the year, rather to come (C) in the economy’s ability to avoid the recession, something earlier in the year many had feared, and instead to come (D) in the economy to avoid the recession many were fearing earlier in the year, and rather to come (E) that the economy will avoid the recession that was feared earlier this year by many, with it instead coming 选A 用had feared 36. 17. GWD25-Q17（原CD16-17） Until recently, the Inuit people led a nomadic existence, sheltering in igloos, the ice-block domes that are peculiar to north-central Canada, and in structures made of stones, bones, driftwood, and skins.
A. Until recently, the Inuit people led a nomadic existence, sheltering B. During recent times, the Inuit people lead a nomadic existence, sheltering C. In the times that are recent, the Inuit people led a nomadic existence, sheltered D. Up until recently, the Inuit people, leading a nomadic existence, have sheltered E. Until recent times, leading a nomadic existence, the Inuit people were sheltered A until recently却不用完成时 这是都根据句意理解吗，求教！！作者: 毛毛carina 时间: 2011-3-11 20:00
第一题是根据句意
第二题是根据动作发生的时候，从过去某个时间开始一直到earlier in the year，所以用过去完成时
第三句也是可以根据意思：直到最近之前， the Inuit people led a nomadic existence。意思是现在已经不是这种生活了，所以是过去式。
在语法方面，until是应该用过去式的~~以下是朗文字典的解释：
if something happens until a particular time, it continues and then stops at that time。
明确说明了某动作是stops at that time~~而不是延续到现在。
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区别一下： until recently 直到最近
recently 不久前到现在
since *** 从过去某个时间点一直到现在作者: 典座 时间: 2020-7-7 06:54
解答一下语法题。刚做完。
recent/recently/recent time，代表着过去，而不是现在。所以要用过去式。Lead的过去式是led。排除B。