| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | we [vb mod] [verb] been at | 5 |
|
| 2 | we [vb mod] have been at | 5 |
|
| 3 | we [vb mod] [vb infin] been at | 5 |
|
| 4 | we [vb mod] have been at | 5 |
|
