| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have been [verb] [adv] for | 15 |
|
| 2 | they have been [verb] [adv] for | 11 |
|
| 3 | they have been [v-ing] [adv] for | 9 |
|
| 4 | they have been [vb pp] [adv] for | 6 |
|
