| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [adv] [adv] easily have been | 14 |
|
| 2 | [modal v] [adv] [adv] easily have been | 14 |
|
| 3 | could [adv] [adv] easily have been | 11 |
|
| 4 | could [adv] [adv] easily have been | 11 |
|
