| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have been [adv] [prep] a | 11 |
|
| 2 | they have been [adv] [prep] a | 11 |
|
| 3 | they have been [adv] for a | 7 |
|
| 4 | they have been [adv] for a | 7 |
|
