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一、在空白处填入一个适当的单词或用所给词的适当形式填空
1. It is kind
2. It is necessary
3. It is possible
4. It is brave of him
5. It was patient of the teacher
1. It is kind
of
you to share your experience with us.2. It is necessary
that
we arrive at the airport at least two hours earlier.3. It is possible
for
us to finish the group project by Friday if we work hard.4. It is brave of him
to stand
(stand) up and speak in front of the whole school.5. It was patient of the teacher
to explain
(explain) the same thing over and over again.答案
1. of 2. that 3. for 4. to stand 5. to explain
解析
【分析】
这几道题均考查it作形式主语的核心句型，解题思路是先判断句型结构：1. 当形容词修饰人的品质时，用固定句型It is + adj. + of sb. to do sth.；2. 当形容词为necessary等时，用句型It is + adj. + that从句；3. 当形容词修饰做某事的性质时，用固定句型It is + adj. + for sb. to do sth.；4. 若括号内给动词，需转化为不定式作真正主语。结合每个小题的形容词和语境，对应填入合适的词或形式。
【解析】
1. 句中形容词kind修饰人的品质，对应句型It is + adj. + of sb. to do sth.，故填of；
2. 形容词necessary后接that引导的主语从句，构成固定句型It is necessary that从句，故填that；
3. 形容词possible修饰“完成项目”这件事，对应句型It is + adj. + for sb. to do sth.，故填for；
4. 形容词brave修饰him的品质，需用不定式作真正主语，对应句型It is + adj. + of sb. to do sth.，故填to stand；
5. 形容词patient修饰teacher的品质，需用不定式作真正主语，对应句型It is + adj. + of sb. to do sth.，故填to explain。
【答案】
1. of 2. that 3. for 4. to stand 5. to explain
【知识点】
It作形式主语的固定句型、介词of/for的用法、不定式作真正主语
【点评】
本题为初中英语基础考点，围绕it作形式主语的核心句型展开，需区分of与for引导的不同句型，以及that从句的使用场景，掌握句型结构即可轻松解答，是常见的基础题型。
【难度系数】
0.7
这几道题均考查it作形式主语的核心句型，解题思路是先判断句型结构：1. 当形容词修饰人的品质时，用固定句型It is + adj. + of sb. to do sth.；2. 当形容词为necessary等时，用句型It is + adj. + that从句；3. 当形容词修饰做某事的性质时，用固定句型It is + adj. + for sb. to do sth.；4. 若括号内给动词，需转化为不定式作真正主语。结合每个小题的形容词和语境，对应填入合适的词或形式。
【解析】
1. 句中形容词kind修饰人的品质，对应句型It is + adj. + of sb. to do sth.，故填of；
2. 形容词necessary后接that引导的主语从句，构成固定句型It is necessary that从句，故填that；
3. 形容词possible修饰“完成项目”这件事，对应句型It is + adj. + for sb. to do sth.，故填for；
4. 形容词brave修饰him的品质，需用不定式作真正主语，对应句型It is + adj. + of sb. to do sth.，故填to stand；
5. 形容词patient修饰teacher的品质，需用不定式作真正主语，对应句型It is + adj. + of sb. to do sth.，故填to explain。
【答案】
1. of 2. that 3. for 4. to stand 5. to explain
【知识点】
It作形式主语的固定句型、介词of/for的用法、不定式作真正主语
【点评】
本题为初中英语基础考点，围绕it作形式主语的核心句型展开，需区分of与for引导的不同句型，以及that从句的使用场景，掌握句型结构即可轻松解答，是常见的基础题型。
【难度系数】
0.7
二、将下列句子改为同义句
1. To speak English every day is important.
→
2. My teacher is kind to spend so much time helping me.
→
3. Staying up late every night is bad for you.
→It is
4. Unfortunately, I missed the last bus home.
→
5. Seeing a rainbow after a storm is a joy.
→It is
1. To speak English every day is important.
→
It
is
important to
speak
English every day.2. My teacher is kind to spend so much time helping me.
→
It
is
kind
of
my teacher to spend so much time helping me.3. Staying up late every night is bad for you.
→It is
bad
for
you to
stay
up
late
every night.4. Unfortunately, I missed the last bus home.
→
It
was
unfortunate
that I missed the last bus home.5. Seeing a rainbow after a storm is a joy.
→It is
a
joy
to
see
a rainbow after a storm.答案
1. It is; to speak 2. It is kind of 3. bad for; to stay up late 4. It was unfortunate 5. a joy to see
解析
【分析】
这几道题是英语同义句转换，核心考点是“it作形式主语”的用法：英语中为避免句子主语过长（头重脚轻），会用it代替真正的主语（不定式或动名词短语），将真正主语后置。解题时需根据原句的主语结构，结合固定句型转换：1. 原句用不定式作主语，转换为“It is + 形容词 + to do sth”结构；2. 若形容词描述人的品质（如kind），用“It is + 形容词 + of sb + to do sth”；3. 若形容词描述事物特征，用“It is + 形容词 + for sb + to do sth”；4. 副词“Unfortunately”可转换为“It was unfortunate that + 从句”结构；5. 原句用动名词作主语，转换为“It is + 名词 + to do sth”结构。
【解析】
1. 原句“To speak English every day is important”是不定式作主语，转换为“It is important to speak”的形式，故填It is; to speak；
2. 原句中“kind”描述人的品质，对应固定句型“It is kind of sb to do sth”，故填It is kind of；
3. 原句“Staying up late every night is bad for you”是动名词作主语，转换为“It is bad for you to stay up late”的形式，故填bad for; to stay up late；
4. 副词“Unfortunately”可转换为“It was unfortunate that”的结构，故填It was unfortunate；
5. 原句“Seeing a rainbow after a storm is a joy”是动名词作主语，转换为“It is a joy to see”的形式，故填a joy to see；
【答案】
1. It is; to speak 2. It is kind of 3. bad for; to stay up late 4. It was unfortunate 5. a joy to see
【知识点】
it作形式主语、同义句转换
【点评】
本题聚焦初中英语核心句型——it作形式主语的应用，考察学生对基础句型的转换能力，是英语学习中需熟练掌握的基础考点，注重对固定结构的灵活运用。
【难度系数】
0.7
这几道题是英语同义句转换，核心考点是“it作形式主语”的用法：英语中为避免句子主语过长（头重脚轻），会用it代替真正的主语（不定式或动名词短语），将真正主语后置。解题时需根据原句的主语结构，结合固定句型转换：1. 原句用不定式作主语，转换为“It is + 形容词 + to do sth”结构；2. 若形容词描述人的品质（如kind），用“It is + 形容词 + of sb + to do sth”；3. 若形容词描述事物特征，用“It is + 形容词 + for sb + to do sth”；4. 副词“Unfortunately”可转换为“It was unfortunate that + 从句”结构；5. 原句用动名词作主语，转换为“It is + 名词 + to do sth”结构。
【解析】
1. 原句“To speak English every day is important”是不定式作主语，转换为“It is important to speak”的形式，故填It is; to speak；
2. 原句中“kind”描述人的品质，对应固定句型“It is kind of sb to do sth”，故填It is kind of；
3. 原句“Staying up late every night is bad for you”是动名词作主语，转换为“It is bad for you to stay up late”的形式，故填bad for; to stay up late；
4. 副词“Unfortunately”可转换为“It was unfortunate that”的结构，故填It was unfortunate；
5. 原句“Seeing a rainbow after a storm is a joy”是动名词作主语，转换为“It is a joy to see”的形式，故填a joy to see；
【答案】
1. It is; to speak 2. It is kind of 3. bad for; to stay up late 4. It was unfortunate 5. a joy to see
【知识点】
it作形式主语、同义句转换
【点评】
本题聚焦初中英语核心句型——it作形式主语的应用，考察学生对基础句型的转换能力，是英语学习中需熟练掌握的基础考点，注重对固定结构的灵活运用。
【难度系数】
0.7
