| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [be] appointed chairman | 15 |
|
| 2 | have be appoint chairman | 15 |
|
| 3 | have [been] appoint chairman | 15 |
|
| 4 | have been appoint chairman | 15 |
|
| 5 | has [be] appoint chairman | 13 |
|
