专业四八级-填空题常考结构 12
时间：2019-02-21 作者：英语课 分类：英文语法词汇
英语课
二十、It结构
一、强调句型 It is + 强调部分+that +其余部分
这个句型需要注意几点：强调部分+其余部分是一个完整的句子；强调部分可以强调主语、宾语和状语，不能强调谓语和定语；强调人使用who或者that, 其他的只能用that (即使是时间和地点)，who 和that绝对不能省略如果原句是过去时态，强调句型使用it was.，例如： 原句： Ann bought these books last year. 强调宾语：It was these books that Ann bought last year. 强调状语：It was last year that Ann bought these books.
二、形式主语 It is + 名词/形容词+ to do/that 引导的句子 to do/that 引导的句子是真正的主语，it 是形式主语，这是为了避免头重脚轻。
例1：It is the interaction between people , rather than A B the events that occur in their lives , that are C the main focus of social psychology 1. D 分析：Rather than …是插入语，主句是强调句型, it is …that, 主语是interaction, 所以是is
例2： ___an increasing international exchange of educational films. (A) It is (B) There is (C) Though there is (D) Although it is 分析：缺少主谓，选择B, it 用在句子的句首，只可能作强调句型或者形式主语。空格后是一个名词短语，只有B与之构成完整的句子。A语义不完整，C、D则使整个句子成了让步从句而缺主句，故都可排除。
一、强调句型 It is + 强调部分+that +其余部分
这个句型需要注意几点：强调部分+其余部分是一个完整的句子；强调部分可以强调主语、宾语和状语，不能强调谓语和定语；强调人使用who或者that, 其他的只能用that (即使是时间和地点)，who 和that绝对不能省略如果原句是过去时态，强调句型使用it was.，例如： 原句： Ann bought these books last year. 强调宾语：It was these books that Ann bought last year. 强调状语：It was last year that Ann bought these books.
二、形式主语 It is + 名词/形容词+ to do/that 引导的句子 to do/that 引导的句子是真正的主语，it 是形式主语，这是为了避免头重脚轻。
例1：It is the interaction between people , rather than A B the events that occur in their lives , that are C the main focus of social psychology 1. D 分析：Rather than …是插入语，主句是强调句型, it is …that, 主语是interaction, 所以是is
例2： ___an increasing international exchange of educational films. (A) It is (B) There is (C) Though there is (D) Although it is 分析：缺少主谓，选择B, it 用在句子的句首，只可能作强调句型或者形式主语。空格后是一个名词短语，只有B与之构成完整的句子。A语义不完整，C、D则使整个句子成了让步从句而缺主句，故都可排除。
n.心理，心理学，心理状态
- She has a background in child psychology.她受过儿童心理学的教育。
- He studied philosophy and psychology at Cambridge.他在剑桥大学学习哲学和心理学。