| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [noun] [prep] | 631 |
|
| 2 | [verb] been president [prep] | 32 |
|
| 3 | [vb past] [be] president [prep] | 26 |
|
| 4 | [vb past] [been] president [prep] | 26 |
|
| 5 | [vb past] be president [prep] | 26 |
|
