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To think about all those animals in danger is sad.（用it作形式主语改

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To think about all those animals in danger is sad.（用it作形式主语改句子） ____ ____
1.To think about all those animals in danger is sad.（用it作形式主语改句子）
____ _____ to think about all those animals in danger.
2.I don't know what I should do next.（改同义句）
I don't know ____ ____ do next.
3.Our duty today is ( to clean the floor).（对括号提问）
_____ _____ our duty today?
4.There are about 1,000 pandas living in nature reserves today.（改否定句）
There ____ about 1,000 pandas _____ in nature reserves today.
5.is,in,best-known,the panda,one,of,the world,the,animals (.)（连词成句）
________________________________________________
To think about all those animals in danger is sad.（用it作形式主语改
1.It's sad
2.what to
3.What is
4.aren't,living
5.The pand is one of the best-known animals in the world.
It's sad to ____all those animals in danger.We should try to 根据题意改写句子1To swim in this river is very dangerous.( 用it作形式主语改 it形式主语从句it作形式主语It makes me sick to think about the problem那是 To swim in this river is very dangerous(用IT作形式主语改写句子） many of us think all animals are danger.in fact Those professors think about in teaching it is highly desire it is all right to show we're sad.这里面it做形式主语,真正主语是后面的不定式,但是 Betty was sad .She heard about so many animals in danger.改为同 Betty was sad.She heard about so many animals in danger.（合并为 将下列句子改it作形式主语 1.playing in the snow is fun 2.the it作形式主语怎么用?it+is+adj.+to+v. To tell your father the truth is necessary 转换成用it 作形式主语