| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not have been [verb] for | 19 |
|
| 2 | not have [been] [verb] for | 15 |
|
| 3 | not have [been] [verb] for | 15 |
|
| 4 | not have [been] [vb pp] for | 14 |
|
| 5 | not have [been] [v-ing] for | 5 |
|
