| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [be] [verb] by a | 251 |
|
| 2 | could [adv] [be] [verb] [prep] a | 193 |
|
| 3 | could [adv] [be] [verb] [prep] a | 193 |
|
| 4 | could [adv] [be] [verb] by [art] | 109 |
|
| 5 | could [adv] [be] [verb] by [art] | 109 |
|
| 6 | could [adv] [be] [verb] by a | 55 |
|
| 7 | could [adv] [be] [verb] by a | 51 |
|
| 8 | could [adv] [be] [verb] by a | 44 |
|
| 9 | could [adv] [be] [verb] by a | 44 |
|
