| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] had been chairman | 6 |
|
| 2 | had been [verb] chairman | 5 |
|
| 3 | had been chairman [prep] | 9 |
|
| 4 | had been chairman [prep] | 9 |
|
| 5 | had been chairman of | 6 |
|
| 6 | had been chairman of | 6 |
|
