1. 作主语：That he should say so surprised us all.

2. 作宾语：We still remember that he said so.

3. 作表语：The fact is that he had left before I came.

4. 作定语：The question that he asked surprised everyone.

5. 作状语：He always spoke as if that was the only way.

6. 作同位语：The news that he won the award made us all so happy.

7. 作介语：We are very sure that he will come tomorrow.