| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [conj] | 544 |
|
| 2 | could [adv] [vb infin] up | 165 |
|
| 3 | [adv] [vb infin] up [conj] | 137 |
|
| 4 | could [vb infin] up [conj] | 52 |
|
