| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they had been [verb] for | 67 |
|
| 2 | they had been [v-ing] for | 36 |
|
| 3 | they had been [vb pp] for | 33 |
|
| 4 | they had been wait for | 8 |
|
| 5 | they had been waiting for | 8 |
|
