| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have [been] [adv] for | 22 |
|
| 2 | [vb mod] have been [adv] for | 22 |
|
| 3 | [vb mod] have [been] there for | 10 |
|
| 4 | could have [been] [adv] for | 6 |
|
| 5 | must have [been] [adv] for | 6 |
|
