两个语法问题.1.the village seemed deserted,the only sign of life b

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两个语法问题.
1.the village seemed deserted,the only sign of life being an ugly-looking black goat an a short langth of rope tied to a tree in a field nearby.
请问此句话中的being是什么用法?
2.请检查此句话是否有误：I finished it at least 20 minutes.（大意是我至少20分钟完成,主要是at least 部分,有没有错误?at least 前后用加“,”么）

1 原句是the village seemed deserted,the only sign of life being an ugly-looking black goat 【on】 a short langth of rope tied to a tree in a field nearby
这句话的主句是：the village seemed deserted
而后面的句子是独立主格结构,动词的部分要用非谓语动词,意思就是不能用was,因为这样一个句子就有了两个谓语动词,显然不对,所以要用was的非谓语形式,being
2 at least只是状语,而状语不影响句子结构
所以去掉at least,句子是I finished it 20 minutes,少了介词in或within
所以应该是I finished it at least in 20 minutes
at least本身没错

两个语法问题.1.the village seemed deserted,the only sign of life b The village seemed deserted,the only sign of life________an The village seemed deserted, the only sign of life being an The village seemed deserted,the only sign of life being an u 英语疑难问题The village seemed deserted,the only sign of life bein The village which had seemed deserted,immediately came to li onlY the firsT sigN of lifE .{YTNE→ENTY【Enty】} only if the first sign of life what sorrow winds through the only if the first sign of life这句话什么意思英语翻译neither of the two opposite of life on a deserted island The tree in the picture is the sign of life 英语翻译The sign on the wall seemed to quaver under a film of sl