| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] sure | 124 |
|
| 2 | [adv] [be] sure [conj] | 100 |
|
| 3 | could [adv] [be] [conj] | 73 |
|
| 4 | could [be] sure [conj] | 33 |
|
