| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could only [vb infin] | 47 |
|
| 2 | it could only have | 12 |
|
| 3 | it could only have | 12 |
|
| 4 | it could only mean | 7 |
|
| 5 | it could only mean | 7 |
|
