| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [vb pp] [conj] | 9801 |
|
| 2 | could be [vb pp] [conj] | 1515 |
|
| 3 | it could be [vb pp] | 1259 |
|
| 4 | it could be [conj] | 163 |
|
