| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how could [pron] [vb infin] [verb] | 168 |
|
| 2 | how could [pron] [adv] [verb] | 150 |
|
| 3 | how could [pron] [vb infin] [adv] | 64 |
|
| 4 | could [pron] [vb infin] [adv] [verb] | 27 |
|
