| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] been [verb] for several [noun] | 12 |
|
| 2 | [vb base] been [verb] for several [noun pl] | 12 |
|
| 3 | have been [verb] for several [noun] | 9 |
|
| 4 | [vb base] been [verb] for several year | 7 |
|
| 5 | [vb base] been [verb] for several years | 7 |
|
| 6 | [vb base] been [v-ing] for several [noun] | 7 |
|
| 7 | [vb base] been [vb pp] for several [noun] | 5 |
|
