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求英语句子成分分析高中必修三unit4课文求下面句子的成分分析,1]What it was to become was

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求英语句子成分分析
高中必修三unit4课文
求下面句子的成分分析,
1]What it was to become was uncertain until between 4.5and3.8billion years ago whenthe dust settled into a solid globe.
求英语句子成分分析高中必修三unit4课文求下面句子的成分分析,1]What it was to become was
这句是主语从句.
What it was to become 主语 was 谓语
uncertain 形容词当表语
until between 4.5and3.8billion years ago .until在这里是介词,between 4.5and3.8billion years ago 是介词宾语.这句是构成整句时间状语.
when the dust settled into a solid globe.是由when引导的定语从句,先行词是between 4.5and3.8billion years ago
例句;he came last night when i was out.