| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [noun] | 1518 |
|
| 2 | [vb past] been [noun pl] | 425 |
|
| 3 | [verb] been difficulties | 11 |
|
| 4 | [vb past] be difficulties | 6 |
|
| 5 | [vb past] [be] difficulties | 6 |
|
| 6 | [vb past] been difficulty | 6 |
|
| 7 | [vb past] [been] difficulties | 6 |
|
