| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [verb] [conj] | 547 |
|
| 2 | could [adv] [vb infin] [conj] | 544 |
|
| 3 | could [adv] believe [conj] | 118 |
|
| 4 | [modal v] [adv] believe [conj] | 79 |
|
| 5 | could [adv] believe [conj] | 26 |
|
