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题库 / GMATLA-SC-76
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.
Until recently, the Inuit people led a nomadic existence, sheltering
During recent times, the Inuit people lead a nomadic existence, sheltering
In the times that are recent, the Inuit people led a nomadic existence, sheltered
Up until recently, the Inuit people, leading a nomadic existence, have sheltered
Until recent times, leading a nomadic existence, the Inuit people were sheltered
题目分析：
本题主要考查了主从句的区别。
选项分析：
选项A：Correct. 本选项在语法和逻辑上均是正确的。
选项B：措辞有误，不能说during recent times，只能说during five years等。这是因为，during身后需要连接一个独立而确定的时间段（例如five years），而不能连接类似于recent times这样的模糊时间。另外，主句的谓语动词应该用过去时，而不能用lead这个一般现在时。
选项C：本选项具有很严重的语法错误。在整个题目中，lead是一个谓语动词，而身后的sheltered也是一个动词的过去式，两个小句间必须有连词来连接，而不能仅靠逗号连接。
选项D：本选项具有较高的迷惑性。利用图形背景原则，我们需要对比主句和伴随状语在时间轴上的持续时间。在逻辑上，“Inuit人住在igloos中”这个事件的持续时间肯定长于“Inuit人引领了流浪生活的风潮”的持续时间。这是因为，肯定是Inuit人“先”住在igloos中，然后他们才能引领流浪风潮。因此，shelter应该是从属成分（伴随状语），lead是主句。
选项E：本选项错误同选项(D)。
choice D
PROBLEM: The "up" is unnecessary. The present perfect tense starts in the past and continues into the present. But the use of "until recently" implies that this has stopped, so the present perfect doesn't work.
Remember that "recently", albeit not too long ago, is still a time in the past.
up until recently up多余
during recent times 错 during后面接明确时间段 而不是模糊时间
until recently/until now+过去式/完成时都可以
在很多时候，现在完成时就是可以和过去时互换的
choice D
PROBLEM: The "up" is unnecessary. The present perfect tense starts in the past and continues into the present. But the use of "until recently" implies that this has stopped, so the present perfect doesn't work.
Remember that "recently", albeit not too long ago, is still a time in the past.
我觉得 D 中 UP UNTIL 中 重复了 UNTIL 已经包含了 UP 的意思吧
up until是可以的
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shelter: intransitive verb
«person, animal» 躲避 duǒbì
▸ to shelter from the storm
躲避暴风雨
▸ to shelter under a tree
躲在树下
在时间轴上持续时间长的事件必然是更大的事件，即，背景事件；在时间轴上持续时间短的事件必然是更小的事件，即，图形事件。
因此，从句（或者分词短语等非谓语动词引导的短语）需要在时间上延续的更长，主句需要在时间上延续的更短。例
完全凭语感选的A....
until recently ...+过去式很常见（有些句子里也加了现在完成时）
until recently用在正式的书面语中很常见
这题搞错了shelter的用法了。。
V: to protect yourself, or another person or thing, from bad weather, danger, or attack
V: to give someone a secret hiding place so that they will not be caught by the army, police, etc
根据题意，应该是第一种意思，用主动。第二种意思才用被动
D的 "have sheltered" 暗示的是性质延续到现在，而 "recently", albeit not too long ago, is still a time in the past.
C 若把sheltered看做的前句的modifier，前句必须是describe something that the Inuit people do while sheltered in igloos.
e.g.,
Amaqjuaq was safe from the bitter Arctic cold, sheltered in an igloo for the night.
——from RON
until recently, did; during后面接具体的时间段。
Until now have done
Until recently did
利用图形背景原则判断哪个时间长短实在很花费时间，而且也不准，每个人想的会不一样
同意
+1
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the ice-block domes that are peculiar to north-central Canada, 这里不是一般现在时嘛，前面用过去时好吗？
existence有生活的意思。lead a nomadic existence：引领了流浪生活。
这句话主要是说，xx人，以一种什么样的状态（ing），引领了流浪生活。
The "up" is unnecessary. The present perfect tense starts in the past and continues into the present. But the use of "until recently" implies that this has stopped, so the present perfect doesn't work.
until recently 直到最近，不久前；应当用过去时态。
昂昂这是个学图形背景原则的题 DE 住在igloos 肯定长于引领潮流 俗语shelter应该是伴随状语 lead是主语
转自 https://gmatclub.com/forum/until-recently-the-inuit-people-led-a-nomadic-existence-80582.html
【D】 The "up" is unnecessary. The present perfect tense starts in the past and continues into the present. But the use of "until recently" implies that this has stopped, so the present perfect doesn't work.
until recently 直到最近，不久前；应当用过去时态。
如果由lead a ...life的结构引申，将Inuit people led a nomadic existence理解为“因纽特人过着游牧的生活（以游牧的方式生存）”。在这种理解下，这部分和下半部“shelter....”分比较，这一部分更容易理解为“背景”吧？
A选项不应该用现在完成时吗？为什么过去时就可以？
本身，在很多时候，现在完成时就是可以和过去时互换的。
RON说recently就是用过去式
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