| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could it [vb infin] | 133 |
|
| 2 | could it have | 62 |
|
| 3 | could it happen | 7 |
|
| 4 | could it do | 6 |
|
| 5 | could it mean | 5 |
|
