She was chosen to make us very happy. Her election made us very happy.
The cause of the accident is a complete mystery. The cause of the accident remains a mystery.
Whether she will come is still a question.
It is not known which team will win the game. It is not known which team will win the game.
Everyone who comes to the party will receive a gift. Everyone who attends the party will receive a gift.
When they will start has not been decided.
Note: The subject clauses in the above examples are all placed at the beginning of the sentence, but sometimes in order to balance the sentence structure and avoid "top-heavy", they are often used as the formal subject and the clauses are placed behind. For example:
It's a pity that she made such a mistake.
It depends on the climate where they go shopping today. Whether they go shopping today depends on the weather.
This constitutes the following common sentence patterns:
This is+adjective/noun+clause.
Unfortunately/unfortunately ... ...
It's possible ... maybe. ...
It's impossible ... impossible. ...
2)It+ intransitive verb+clause
It seems/seems ... it seems ...
Happened ... happened. ...
3)It+be+ past participle+clause
It is said that ... it is said that ...
As we all know ... as we all know. ...
It is reported ... it is reported. ...
It is believed that ... it is believed that ...; It is believed that ...
It was suggested ... it was suggested. ...
It must be pointed out that ... it must be pointed out that ...
It has been proved that ... For example:
At least 20 buildings are believed to have been damaged or destroyed.
It is suggested that the meeting should be postponed. It was suggested that the meeting be postponed.
It is reported that three people were killed and five people were seriously injured in the accident. It is reported that three people were killed and five people were seriously injured in the accident.
As we all know, Taiwan Province is an inalienable part of China. As we all know, Taiwan Province Province is an inalienable part of China.
Extended data
Several characteristics of object clauses used to distinguish subject clauses;
1, leading words: what \ which \ who \ when \ where \ if \ where.
2 word order: the object clause must be a declarative sentence. (Nominal clauses are all declarative word order)
I think you must work hard.
The difference between leading words and object clauses, negative transfer and so on.
Supplement: The word order of clauses is always declarative.