it做形式主语的19个句型
1.Itis\\\/was+被强调部分+that\\\/who...该句型是强调句型。
被强调部分可以是主语，宾语，表语或状语。
强调的主语如果是人，that可以由who换用。
如果把这种句型结构划掉后，应该是一个完整无缺的句子。
这也是判断强调句型与其它从句的方法。
2.Itisnotuntil+被强调部分+that...该句型也是强调句型。
主要用于强凋时间状语，译成汉语“直到……才……”，可以说是not...until...的强调形式。
ItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousfilmstar.=NotuntilshetookoffherdarkglassesdidIrealizeshewasafamousfilmstar.=Ididn'trealizeshewasafamousfilmstaruntilshetookoffherdarkglasses.3.Itisclear\\\/obvious\\\/true\\\/possible\\\/certain…that…该句型中it是形式主语，真正的主语是that引导的主语从句，常译为“清楚（显然，真的，肯定……）”是主语从句最常见的一种结构。
Itisveryclearthathe'sroundandtalllikeatree. =Thathe'sroundandtalllikeatreeisveryclear.4.Itisimportant\\\/necessary\\\/right\\\/strange\\\/natural...that...+(should)do该句型和上一个同属一个句型。
由于主句中的形容词不同，that后的从句中要用虚拟语气（should+动词原形），should可以省去。
5.Itissaid(reported,learned…)that…该句型中的it仍是形式
主语从句中it做形式主语的常见句型
您好，很高兴为您解答常见句型有：1. It + be + 形容词+主语从句，如：It is uncertain whether he can come to Jenny’s birthday party or not.2. It + be + 名词词组 + 主语从句，这类名词有：a fact, a pity, a shame, an honour，a question等，如：It’s a pity that you missed the exciting football match.It remains a question whether he will come or not.3. It + be + 过去分词+ 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown等，如：It is reported that 16 people were killed in the earthquake.It is not decided who will give the operation to the patient.4. It + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有：appear, happen, seem等，如：It seemed that he didn’t tell the truth.It happened that I was out when he called.5. It + be + 形容词+ for sb.）+ 动词不定式 这类句型常用形容词easy, difficult, hard, important, possible，wise等作表语，有时候为了强调不定式动作的执行者，常在不定式前加for sb，如：It’s necessary for the young to master two foreign language.It is unwise to give the children whatever they want.这类形容词有：easy, difficult, hard, important, possible，wise6. It + be + 形容词 + of sb. + 动词不定式，这类形容词常是表示心理品质,性格特征的形容词，如：kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate等。
某人和这些形容词可以构成主系表结构。
如：It’s very kind of you to help me with the work. =You are kind to help me.It seemed selfish of him not to share his dictionary with others.=He seemed selfish not to share his dictionary with others.7. It + be +名词词组 + 动词不定式，如：It is not a good habit to stay up too late.8. It + be + 名词或形容词+ 动名词，这类名词和形容词常常是：good, no good, no use, a waste of, useless, senseless等，如：It’s a waste of time talking to her any more.It is no use arguing about the matter with him.9. It + take ( sb. )+ 时间（金钱）+ 动词不定式，如：It took the workers almost three years to finish building the dam.It will take a whole day to get to the top of the mountain on foot.希望能帮助到您，谢谢。
望采纳。
“it”引导主语从句和“it”做形式主语还有强调句型的区别分别是什么
Eating vegetables and fruit are good for him. 是动名词做主语。
但原句子不对，Eating vegetables and fruit 是动名词，应为单数主语：Eating vegetables and fruit is good for him。
如果改为形式主语，是这样的：It is good for him to eat vegetables and fruit。
句子意思不变。
用it作形式主语的句型改写下列句子
It's funny visiting the museum.It's hard to learn to drive.It's a waste of time palying computer games all day long.It's impossible to finish the work in day.It's difficult to answer the question in English.It's important for me learning Chinese well.It's unlikely to win the game for us.It's useful for us doing some maths exercises.It's impolite to speak with your mouth full.It;s easy for my mother cooking delicious food.
it引导主语从句和it做形式主语还有强调句型的区别
it引导的主语从句，形式主语就是it，真正的主语在句子的后面，通常是to do的不定式短语。
而强调句的结构 it is\\\/was+被强调部分+that\\\/who+句子其余部分，结构词it is\\\/was和that\\\/who都是没有实际意思的，只是构成句子结构的词而已。
这个强调句只能强调名词和代词，也就是主语和宾语，不能强调其他句子成分。
你可以对比一下下面两句：主语从句：It is kind of you to help me with my housework.强调句：It is you who help me with my housework.主语从句中it做形式主语的常见句型常见句型有：1. It + be + 形容词+主语从句，如：It is uncertain whether he can come to Jenny’s birthday party or not.2. It + be + 名词词组 + 主语从句，这类名词有：a fact, a pity, a shame, an honour，a question等，如：It’s a pity that you missed the exciting football match.It remains a question whether he will come or not.3. It + be + 过去分词+ 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown等，如：It is reported that 16 people were killed in the earthquake.It is not decided who will give the operation to the patient.it做形式主语 必须用that引导从句吗不是必须..it做形式主语，后面内容做句子真正主语，除了由主语从句充当之外，还可以由不定时，不定时短语，动名词以及动名词短语充当，例如下面句子It is very useful to learn English so well It is the police's duty to protect the peope's life and properties It is not so effective learning English without practising speaking English with others as often as possibleIt is his duty taking good care of all his children.
求翻译及句型解析,是形式主语么
那主语是什么
是的 真正的主语是后面的不定式判断的方法就是 把可能是真正主语的部分代替It 放入句中，看是否是一个完整的句子
