| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [prep] a | 1096 |
|
| 2 | it could [vb infin] [prep] | 375 |
|
| 3 | it could [vb infin] a | 146 |
|
| 4 | it [vb infin] [prep] a | 108 |
|
