| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have been chairman of | 17 |
|
| 2 | [pers pn] have been chairman of | 14 |
|
| 3 | [pron] has been chairman of | 11 |
|
| 4 | he have been chairman of | 11 |
|
| 5 | he have been chairman of | 11 |
|
