| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i could n't be [adj] | 37 |
|
| 2 | i could n't be [adj] | 32 |
|
| 3 | [pron] could n't be certain | 13 |
|
| 4 | [pers pn] could n't be certain | 13 |
|
| 5 | i [modal v] n't be certain | 8 |
|
| 6 | i could [adv] be certain | 8 |
|
| 7 | i could [not/n't] be certain | 7 |
|
| 8 | i could not be certain | 7 |
|
| 9 | i could n't [be] certain | 5 |
|
| 10 | i could n't [be] certain | 5 |
|
| 11 | i could n't be certain | 5 |
|
| 12 | i could n't be certain | 5 |
|
| 13 | i could n't be certain | 5 |
|
