It is certain that if there are fewer people driving, there will be less air pollution.
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/It-is-certain-that-if-there-are-fewer-people-driving+-there-will-be-less-air-pollution.=["It", "is", "certain", "that", "if", "there", "are", "fewer", "people", "driving", ",", "there", "will", "be", "less", "air", "pollution", "."][{"i": 5, "s": [2, 3, 4], "r": "陈述句", "e": [3, 4, 18], "d": {"poses": [2], "piece_poses": [0, 1, 2]}}, {"i": 6, "s": [4, 11], "r": "固定搭配", "e": [11, 18], "d": {"poses": [0, 1], "piece_poses": [0, 1]}}, {"i": 7, "s": [4, 5, 11], "r": "固定搭配", "e": [5, 11, 18], "d": {"poses": [1, 2], "piece_poses": [0, 1, 2]}}, {"i": 17, "s": [7, 9], "r": "名词短语", "e": [9, 11], "d": {"poses": [0, 1], "piece_poses": [0, 1]}}][{"s": 0, "r": 3, "e": 1, "t": 2}, {"s": 0, "r": 3, "e": 1, "t": 2}, {"s": 1, "r": 9, "e": 2, "t": 2}, {"s": 2, "r": 4, "e": 3, "t": 2}, {"s": 3, "r": 20, "e": 18, "t": 2}, {"s": 3, "r": 8, "e": 4, "t": 2}, {"s": 4, "r": 5, "e": 11, "t": 2}, {"s": 4, "r": 8, "e": 5, "t": 2}, {"s": 5, "r": 21, "e": 6, "t": 2}, {"s": 6, "r": 9, "e": 7, "t": 2}, {"s": 7, "r": 3, "e": 11, "t": 2}, {"s": 7, "r": 3, "e": 9, "t": 2}, {"s": 9, "r": 15, "e": 11, "t": 2}, {"s": 9, "r": 9, "e": 10, "t": 2}, {"s": 11, "r": 21, "e": 12, "t": 2}, {"s": 12, "r": 22, "e": 13, "t": 2}, {"s": 13, "r": 9, "e": 14, "t": 2}, {"s": 14, "r": 2, "e": 18, "t": 2}]{"pred": [1, 2, "be 动词", ""], "subj": [0, 1, "形式主语", "It"], "comps": [[2, 3, "表语(形容词)", "certain"], [3, 18, "真实主语", "that if there ••• pollution."]]}{"pred": [1, 2, "be 动词", "is"], "subj": [0, 1, "形式主语", "It"], "comps": [[2, 3, "表语(形容词)", "certain"], [3, 18, "真实主语", "that if there ··· pollution."]]}{"coos": [], "c": null, "e": 18, "subs": [{"coos": [], "c": 2, "e": 18, "subs": [{"coos": [], "c": 2, "e": 11, "subs": [], "s": 5, "r": "状语从句"}, {"coos": [], "c": 1, "e": 18, "subs": [], "s": 11, "r": "主句"}], "s": 4, "r": "主语从句"}], "s": 0, "r": "陈述句"}
sentence It is certain that if there are fewer people driving, there will be less air pollution. /It-is-certain-that-if-there-are-fewer-people-driving+-there-will-be-less-air-pollution.= ad9fff35-82f3-4c10-8026-8d41447ad39e 1 1
暂无语法

可尝试扩展句子。越复杂的句子，分析结果越丰富。

[[2, 3], [3, 4], [4, 18]]
[]

It + is + certain + (for + sb.) + (that) + 主语从句

[[4, 11], [11, 18]]
[]

前置状语 + 主句, 构成状语前置结构

[[4, 5], [5, 11], [11, 18]]
[]

if 引导的状语从句

[[7, 9], [9, 11]]
[]

sth. + 动词的现在分词形式作定语

sth.  当前为 fewer people

[[5, 6], [6, 7], [7, 11]]
[]

There + be. + sth.

[[11, 12], [13, 14], [14, 18]]
[]

There + be. + sth.

[[14, 15], [15, 18]]
[]

less + sth.

[[15, 16], [16, 17]]
[]

air + pollution

n. 大气污染, 空气污染
显示全部
It is certain that if there are fewer people driving, there will be less air pollution.

这是一个复杂句。

主句
It is certain that if there are fewer people driving, there will be less air pollution.
这是一个陈述句，其时态为一般现在时。
成分划分
It形式主语 isbe 动词 certain表语(形容词) that if there ··· pollution.真实主语
从句
if there are fewer people driving, there will be less air pollution.

这是一个主语从句，其时态为一般将来时。

其满足特殊句型： 。详情请参考下文具体介绍。

成分划分
there形式主语或倒装引导词 will bebe 动词(复合结构) less air pollution.真实主语
谓语动词的状语、补语、伴随语:
if there are ··· driving,
从句
there are fewer people driving,

这是一个状语从句，其时态为一般现在时。

成分划分
there形式主语或倒装引导词 arebe 动词 fewer people driving,真实主语
句型分析
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