每日英句解析7.16☞句子出自新概念第三册lesson 1
☞句子出自新概念第三册lesson 1
It immediately ran away when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered.她刚看见它，它就立刻逃走了。专家证实，美洲狮除非被逼的走投无路，是绝不会伤人的。
【解析】句子主干It……ran away……（主谓）
It 是主语；immediately 副词做状语；ran away 谓语，用了一般过去时；when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered状语从句。
在状语从句“when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered”中，句子主干为“……she saw it, and experts confirmed that……”（主谓宾）
when 是连接词；she 是名词做主语；saw谓语，用了一般过去时； it宾语； and连词； experts 是主语；confirmed 是谓语，用了一般过去时；“that a puma will not attack a human being unless it is cornered”是一个宾语从句，是“confirmed”的宾语。
在此宾语从句中，that 是连接词；a puma 是主语；will not attack是谓语，用了一般将来时和否定语态； a human being 是宾语☞注意“human being”是一个固定词组，意为“人类”；“unless it is cornered”在此宾语从句中做状语，它是一个状语从句！unless是连词； it是主语 “is cornered”是谓语，用了一般现在时和被动语态。
每日英句解析7.16☞句子出自新概念第三册lesson 1
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