| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] some [noun pl] | 16 |
|
| 2 | have been [v-ing] some [noun pl] | 13 |
|
| 3 | had been [verb] some [noun pl] | 11 |
|
| 4 | have been [verb] some years | 9 |
|
