原句I think that it is important to master a foreign language.的it是形式主语.
I think it important to master a foreign language.it是形式宾语
1.it做形式主语
It is +adj.+(for sb.) +to do sth.
It is time to do/for/that.
2.it做形式宾语
原句I think that it is important to master a foreign language.的it是形式主语.
I think it important to master a foreign language.it是形式宾语
1.it做形式主语
It is +adj.+(for sb.) +to do sth.
It is time to do/for/that.
2.it做形式宾语