Doctors say it good for us.=Doctors say it for us.(同意句转换)DOCTORS SAY IT IS GOOD FOR US.DOCTORS SAY IT FOR US.

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Doctors say it good for us.=Doctors say it __ __for us.(同意句转换)DOCTORS SAY IT IS GOOD FOR US.DOCTORS SAY IT __ __ FOR US.
Doctors say it good for us.=Doctors say it __ __for us.(同意句转换)
DOCTORS SAY IT IS GOOD FOR US.
DOCTORS SAY IT __ __ FOR US.

Doctors say it good for us.=Doctors say it __ __for us.(同意句转换)DOCTORS SAY IT IS GOOD FOR US.DOCTORS SAY IT __ __ FOR US.
is good
Doctors say it good for us to do sth.
=Doctors say it is good for us to do sth.

只能填一个单词吗？是不是useful for us .

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应该填 is。
原句Doctors say it good for us.是一个简单句。其中 Doctors 是主语，say是谓语，it是形式宾语， good作形式宾语it的宾语补足语（简称宾补），来修饰补足前面的it.而真正的宾语是us，for是介词起连接作用，翻译过来就是医生说（Doctors say) … 说什么呢，说 “好（it good）”，什么好呢“对我们好（for us），医生真正说的对象的是“我们，所以us才是真正的宾语。因为本句仅由简单的，主，谓，宾三基本结构构成，即只有一个基本的句子，所以被称为简单句。
而同义句Doctors say it is good for us 则是一个从句，是复杂句，因为在其中，Doctors作整个句子的主语，say作谓语，而整个句子的宾语，是it is good for us这个句子。翻译过来解释就是说： “医生说（Doctors say）”，他说的是什么呢，他说的内容是“那对我们好（it is good for us）它it（指代某件事，如多吃水果蔬菜，常锻炼之类的事) 对于for 我们us 是is 好的good”。这一小句话作为医生所说的内容，所以做大句的宾语。在这个小从句中，it是主语，is是谓语。所以在整个大句子中出现了一个小句子随从在一个大句子上共同构成一个句子的情况。其中，随从的小句叫做从句，大句叫作主句，从句充当主句的什么成份，这个完整的句子就叫做什么从句。如本句，从句it is good for us 作主句Doctors say 的宾语，所以这整个句子就是宾语从句。在这种情况下，这个句子已经不是由单一的主，谓，宾构成，而是出现了多个主谓宾结构，所以被称作复杂句，在从句中，如果主句用现在时，则从句可以用任意时态，如果主句用的是过去时，则从句也必须使用过去时，如果主句是将来时，从句也是将来时。且如果否定一个从句，只能否定主句的动词，不能否定从句的动词。例如：无论你想表达的是 “我不认为你是对的”或者“我认为你不是对的”，用英语都只能说I don't think you are right. 而不能说I think you aren't right 。
当然，语法总是让人弄晕头脑，这到题最见到的解释就是：固定结构 It+be动词+adj形容词+for sb (+to do sth ).对于某人来说（做某事）是怎么样的。这个结构可以和 It +adj+for sb (+to do sth)互换。
讲这么多，希望没有把你弄晕。

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is。

Doctors say it is good for us 同义句转换 Doctors say it___ ___ for us. Doctors say it good for us.=Doctors say it __ __for us.(同意句转换)DOCTORS SAY IT IS GOOD FOR US.DOCTORS SAY IT __ __ FOR US. Doctors say it is good for us.=Doctors say it ______ for us.（横线上填两个词） Doctors say it is good for us.(同义句转换）Doctors say it __ __ for us. Doctors say d___ much water is good. 短文综合填空exercising is f _.doctors say it is good f_us.it m+ourbody strong.people do better intheir work that those who d_exercise.2.is she your new teacher?i an not sure .m_she is. it s time to say good morning It's so good to say 初二上册的英语短文填空题!用方框内所给词的适当形式填空.good,make,two,give,exercise,have,sport,place,fun,buyWe all need to exercise.Doctors say it is good for us.It _____your heartand body strong.It also ______you more energy. Exercising is good for our health.Everyone knows that exercise is important.We all need exercise.Doctors say it is good for us.It makes your heart and body strong.Children often exercise.There are different kinds of exercise.You can walk,run swim,ska Say good 、、 say good say good I think it's easy to stay h---.His s--- is not good,so he can't eat food for 24 hours.Doctors say d--- much water is good.He knows the answer and he puts up his right h---.He was so h--- that he ate a lot.We try to keep the b--- of nature. It's i__ to say like that.It's not good manners to say like that 英语翻译Everyone knows that exercise is important .We all need to exercise .Doctors say it is good for us .It makes your heart and body strong .Children who often exercise are more alert （灵活的）.This means they do better in tests and scho 英语翻译Everyone knows that exercise is important.We all need to do exercise.Doctors say it is good for us.It makes our heart and body strong.If children often exercise,they will be more alert.There are many ways to exercise.You can walk,run,swim Doctors say people should keep o_____________填词