| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [modal v] [be] sure [conj] | 170 |
|
| 2 | [pron] [modal v] not [be] sure | 111 |
|
| 3 | [modal v] not [be] sure [conj] | 40 |
|
| 4 | [pron] [modal v] not [be] [conj] | 31 |
|
